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Towers MW, Karancsi T, Jones EA, Pringle SD, Claude E. Optimised Desorption Electrospray Ionisation Mass Spectrometry Imaging (DESI-MSI) for the Analysis of Proteins/Peptides Directly from Tissue Sections on a Travelling Wave Ion Mobility Q-ToF. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:2456-2466. [PMID: 30168053 PMCID: PMC6276080 DOI: 10.1007/s13361-018-2049-0] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 07/20/2018] [Accepted: 08/03/2018] [Indexed: 05/04/2023]
Abstract
Desorption electrospray ionisation mass spectrometry imaging (DESI-MSI) is typically known for the ionisation of small molecules such as lipids and metabolites, in singly charged form. Here we present a method that allows the direct detection of proteins and peptides in multiply charged forms directly from tissue sections by DESI. Utilising a heated mass spectrometer inlet capillary, combined with ion mobility separation (IMS), the conditions with regard to solvent composition, nebulising gas flow, and solvent flow rate have been explored and optimised. Without the use of ion mobility separation prior to mass spectrometry analysis, only the most abundant charge series were observed. In addition to the dominant haemoglobin subunit(s) related trend line in the m/z vs drift time (DT) 2D plot, trend lines were found relating to background solvent peaks, residual lipids and, more importantly, small proteins/large peptides of lower abundance. These small proteins/peptides were observed with charge states from 1+ to 12+, the majority of which could only be resolved from the background when using IMS. By extracting charge series from the 2D m/z vs DT plot, a number of proteins could be tentatively assigned by accurate mass. Tissue images were acquired with a pixel size of 150 μm showing a marked improvement in protein image resolution compared to other liquid-based ambient imaging techniques such as liquid extraction surface analysis (LESA) and continuous-flow liquid microjunction surface sampling probe (LMJ-SSP) imaging. Graphical Abstract ᅟ.
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Affiliation(s)
- Mark W Towers
- Waters Corporation, Stamford Avenue, Altricham Road, Wilmslow, SK9 4AX, UK.
| | - Tamas Karancsi
- Waters Research Centre, Záhony utca., C ép., 1. Em., Budapest, 1031, Hungary
| | - Emrys A Jones
- Waters Corporation, Stamford Avenue, Altricham Road, Wilmslow, SK9 4AX, UK
| | - Steven D Pringle
- Waters Corporation, Stamford Avenue, Altricham Road, Wilmslow, SK9 4AX, UK
| | - Emmanuelle Claude
- Waters Corporation, Stamford Avenue, Altricham Road, Wilmslow, SK9 4AX, UK
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2
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Klein DR, Feider CL, Garza KY, Lin JQ, Eberlin LS, Brodbelt JS. Desorption Electrospray Ionization Coupled with Ultraviolet Photodissociation for Characterization of Phospholipid Isomers in Tissue Sections. Anal Chem 2018; 90:10100-10104. [PMID: 30080398 DOI: 10.1021/acs.analchem.8b03026] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Desorption electrospray ionization (DESI) mass spectrometry imaging has become a powerful strategy for analysis of tissue sections, enabling differentiation of normal and diseased tissue based on changes in the lipid profiles. The most common DESI workflow involves collection of MS1 spectra as the DESI spray is rastered over a tissue section. Relying on MS1 spectra inherently limits the ability to differentiate isobaric and isomeric species or evaluate variations in the relative abundances of key isomeric lipids, such as double-bond positional isomers which may distinguish normal and diseased tissues. Here, 193 nm ultraviolet photodissociation (UVPD), a technique capable of differentiating double-bond positional isomers, is coupled with DESI to map differences in the double-bond isomer composition in tissue sections in a fast, high throughput manner compatible with imaging applications.
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Affiliation(s)
- Dustin R Klein
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Clara L Feider
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Kyana Y Garza
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - John Q Lin
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Livia S Eberlin
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Jennifer S Brodbelt
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
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3
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Honarvar E, Venter AR. Ammonium Bicarbonate Addition Improves the Detection of Proteins by Desorption Electrospray Ionization Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:1109-1117. [PMID: 28315234 DOI: 10.1007/s13361-017-1628-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 01/26/2017] [Accepted: 02/09/2017] [Indexed: 05/11/2023]
Abstract
The analysis of protein by desorption electrospray ionization mass spectrometry (DESI-MS) is considered impractical due to a mass-dependent loss in sensitivity with increase in protein molecular weights. With the addition of ammonium bicarbonate to the DESI-MS analysis the sensitivity towards proteins by DESI was improved. The signal to noise ratio (S/N) improvement for a variety of proteins increased between 2- to 3-fold relative to solvent systems containing formic acid and more than seven times relative to aqueous methanol spray solvents. Three methods for ammonium bicarbonate addition during DESI-MS were investigated. The additive delivered improvements in S/N whether it was mixed with the analyte prior to sample deposition, applied over pre-prepared samples, or simply added to the desorption spray solvent. The improvement correlated well with protein pI but not with protein size. Other ammonium or bicarbonate salts did not produce similar improvements in S/N, nor was this improvement in S/N observed for ESI of the same samples. As was previously described for ESI, DESI also caused extensive protein unfolding upon the addition of ammonium bicarbonate. Graphical Abstract ᅟ.
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Affiliation(s)
- Elahe Honarvar
- Department of Chemistry, Western Michigan University, Kalamazoo, MI, 49008-5413, USA
| | - Andre R Venter
- Department of Chemistry, Western Michigan University, Kalamazoo, MI, 49008-5413, USA.
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Brauer JI, Beech IB, Sunner J. Mass Spectrometric Imaging Using Laser Ablation and Solvent Capture by Aspiration (LASCA). JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:1538-1547. [PMID: 26122514 DOI: 10.1007/s13361-015-1176-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 04/24/2015] [Accepted: 04/25/2015] [Indexed: 06/04/2023]
Abstract
A novel interface for ambient, laser ablation-based mass spectrometric imaging (MSI) referred to as laser ablation and solvent capture by aspiration (LASCA) is presented and its performance demonstrated using selected, unaltered biological materials. LASCA employs a pulsed 2.94 μm laser beam for specimen ablation. Ablated materials in the laser plumes are collected on a hanging solvent droplet with electric field-enhanced trapping, followed by aspiration of droplets and remaining plume material in the form of a coarse aerosol into a collection capillary. The gas and liquid phases are subsequently separated in a 10 μL-volume separatory funnel, and the solution is analyzed with electrospray ionization in a high mass resolution Q-ToF mass spectrometer. The LASCA system separates the sampling and ionization steps in MSI and combines high efficiencies of laser plume sampling and of electrospray ionization (ESI) with high mass resolution MS. Up to 2000 different compounds are detected from a single ablation spot (pixel). Using the LASCA platform, rapid (6 s per pixel), high sensitivity, high mass-resolution ambient imaging of "as-received" biological material is achieved routinely and reproducibly.
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Affiliation(s)
- Jonathan I Brauer
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, 73019, USA
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5
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Abstract
Developments in forensic mass spectrometry tend to follow, rather than lead, the developments in other disciplines. Examples of techniques having forensic potential born independently of forensic applications include ambient ionization, imaging mass spectrometry, isotope ratio mass spectrometry, portable mass spectrometers, and hyphenated chromatography-mass spectrometry instruments, to name a few. Forensic science has the potential to benefit enormously from developments that are funded by other means, if only the infrastructure and personnel existed to adopt, validate, and implement the new technologies into casework. Perhaps one unique area in which forensic science is at the cutting edge is in the area of chemometrics and the determination of likelihood ratios for the evaluation of the weight of evidence. Such statistical techniques have been developed most extensively for ignitable-liquid residue analyses and isotope ratio analysis. This review attempts to capture the trends, motivating forces, and likely impact of developing areas of forensic mass spectrometry, with the caveat that none of this research is likely to have any real impact in the forensic community unless: (a) The instruments developed are turned into robust black boxes with red and green lights for positives and negatives, respectively, or (b) there are PhD graduates in the workforce who can help adopt these sophisticated techniques.
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Montowska M, Rao W, Alexander MR, Tucker GA, Barrett DA. Tryptic digestion coupled with ambient desorption electrospray ionization and liquid extraction surface analysis mass spectrometry enabling identification of skeletal muscle proteins in mixtures and distinguishing between beef, pork, horse, chicken, and turkey meat. Anal Chem 2014; 86:4479-87. [PMID: 24673366 DOI: 10.1021/ac5003432] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The use of ambient desorption electrospray ionization mass spectrometry (DESI-MS) and liquid extraction surface analysis mass spectrometry (LESA-MS) is explored for the first time to analyze skeletal muscle proteins obtained from a mixture of standard proteins and raw meat. Single proteins and mixtures of up to five proteins (myoglobin, troponin C, actin, bovine serum albumin (BSA), tropomyosin) were deposited onto a polymer surface, followed by in situ tryptic digestion and comparative analysis using DESI-MS and LESA-MS using tandem electrospray MS. Peptide peaks specific to individual proteins were readily distinguishable with good signal-to-noise ratio in the five-component mixture. LESA-MS gave a more stable analysis and greater sensitivity compared with DESI-MS. Meat tryptic digests were subjected to peptidomics analysis by DESI-MS and LESA-MS. Bovine, horse, pig, chicken, and turkey muscle digests were clearly discriminated using multivariate data analysis (MVA) of the peptidomic data sets. The most abundant skeletal muscle proteins were identified and correctly classified according to the species following MS/MS analysis. The study shows, for the first time, that ambient ionization techniques such as DESI-MS and LESA-MS have great potential for species-specific analysis and differentiation of skeletal muscle proteins by direct surface desorption.
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Affiliation(s)
- Magdalena Montowska
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
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7
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Du HL, Chen ZP, Song M, Chen Y, Yu RQ. Novel calibration model maintenance strategy for solving the signal instability in quantitative liquid chromatography–mass spectrometry. J Chromatogr A 2014; 1338:44-50. [DOI: 10.1016/j.chroma.2014.02.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 02/11/2014] [Accepted: 02/12/2014] [Indexed: 10/25/2022]
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Cai Y, Adams D, Chen H. A new splitting method for both analytical and preparative LC/MS. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2014; 25:286-92. [PMID: 24254577 DOI: 10.1007/s13361-013-0763-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 09/18/2013] [Accepted: 09/28/2013] [Indexed: 05/28/2023]
Abstract
This paper presents a novel splitting method for liquid chromatography/mass spectrometry (LC/MS) application, which allows fast MS detection of LC-separated analytes and subsequent online analyte collection. In this approach, a PEEK capillary tube with a micro-orifice drilled on the tube side wall is used to connect with LC column. A small portion of LC eluent emerging from the orifice can be directly ionized by desorption electrospray ionization (DESI) with negligible time delay (6~10 ms) while the remaining analytes exiting the tube outlet can be collected. The DESI-MS analysis of eluted compounds shows narrow peaks and high sensitivity because of the extremely small dead volume of the orifice used for LC eluent splitting (as low as 4 nL) and the freedom to choose favorable DESI spray solvent. In addition, online derivatization using reactive DESI is possible for supercharging proteins and for enhancing their signals without introducing extra dead volume. Unlike UV detector used in traditional preparative LC experiments, this method is applicable to compounds without chromophores (e.g., saccharides) due to the use of MS detector. Furthermore, this splitting method well suits monolithic column-based ultra-fast LC separation at a high elution flow rate of 4 mL/min. Figure ᅟ
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Affiliation(s)
- Yi Cai
- Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry, Ohio University, Athens, OH, 45701, USA
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9
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Xu X, Qiao J, Deng X, Na N, Ouyang J. Salicylaldehyde azine cluster formation observed by cold-spray ionization mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2013; 48:961-968. [PMID: 23893644 DOI: 10.1002/jms.3238] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 05/19/2013] [Accepted: 05/21/2013] [Indexed: 06/02/2023]
Abstract
We installed a cold-spray ionization (CSI) source on a mass spectrometer to investigate the self-assembly behavior of an aggregation-induced emission enhancement system. Using a CSI source and the three-dimensional platform, a self-assembly system of a salicylaldehyde azine (SAA) was studied in mixture solution. This method permitted the determination of the structural information of the solution state, which cannot be detected by conventional mass spectrometry. In addition to the [M+H](+) ion (M is the SAA molecule), many major ion clusters such as [2M+Na](+) at m/z 503, [3M+Na](+) at m/z 743, [4M+Na](+) at m/z 983 and higher order aggregates were observed in the CSI mass spectra. However, many fragment ions, with the exception of cluster ions, appeared with high abundance when the ESI ion source was used due to the desolvation chamber temperature, suggesting that some aggregation can be detected at low temperatures. To investigate the effect of solvent on the aggregation, the CSI-mass spectrometry (MS) experiments of SAA in absolute ethanol solution and ethanol/water (good/poor solvent) mixture solution were conducted. The most abundant ion peak was protonated SAA (m/z 241) in absolute ethanol, but many cluster ions and some multiple charged ion peaks were observed after adding a small amount of water into the ethanol solution. The results showed good agreement with that inferred by the combinational analysis of scanning electron microscope and fluorescence microscopy, indicating that CSI-MS is capable of providing self-assembly information of labile molecules in the solution state.
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Affiliation(s)
- Xiangyu Xu
- College of Chemistry, Beijing Normal University, Beijing, 100875, China
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10
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Perez JJ, Flanigan PM, Karki S, Levis RJ. Laser electrospray mass spectrometry minimizes ion suppression facilitating quantitative mass spectral response for multicomponent mixtures of proteins. Anal Chem 2013; 85:6667-73. [PMID: 23751016 DOI: 10.1021/ac400401h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A comparison of the mass spectral response for myoglobin, cytochrome c, and lysozyme is presented for laser electrospray mass spectrometry (LEMS) and electrospray ionization-mass spectrometry (ESI-MS). Analysis of multicomponent protein solutions using nonresonant femtosecond (fs) laser vaporization with electrospray postionization mass spectrometry exhibited significantly reduced ion suppression effects in comparison with conventional ESI analysis, enabling quantitative measurements over 4 orders of magnitude in concentration. No significant charge reduction was observed in the LEMS experiment while the ESI measurement revealed charge reduction for myoglobin and cytochrome c as a function of increasing protein concentration. Conventional ESI-MS of each analyte from a multicomponent solution reveals that the ion signal detected for myoglobin and cytochrome c reaches a plateau and then begins to decrease with increasing protein concentration preventing quantitative analysis. The ESI mass spectral response for lysozyme from the mixture initially decreased, before increasing, with increasing multicomponent solution concentration.
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Affiliation(s)
- Johnny J Perez
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
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11
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Shrestha B, Javonillo R, Burns JR, Pirger Z, Vertes A. Comparative local analysis of metabolites, lipids and proteins in intact fish tissues by LAESI mass spectrometry. Analyst 2013; 138:3444-9. [DOI: 10.1039/c3an00631j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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12
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Achievements and future trends in the analysis of emerging organic contaminants in environmental samples by mass spectrometry and bioanalytical techniques. J Chromatogr A 2012; 1259:86-99. [DOI: 10.1016/j.chroma.2012.07.024] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 06/10/2012] [Accepted: 07/09/2012] [Indexed: 12/16/2022]
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13
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Rao W, Scurr DJ, Burston J, Alexander MR, Barrett DA. Use of imaging multivariate analysis to improve biochemical and anatomical discrimination in desorption electrospray ionisation mass spectrometry imaging. Analyst 2012; 137:3946-53. [PMID: 22779078 DOI: 10.1039/c2an35430f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Desorption electrospray ionisation (DESI) mass spectrometry images usually contain a large amount of information that can be difficult to interpret in an objective manner. We explore the use of imaging multivariate analysis (MVA) on DESI images of protein spots and rat brain sections to automatically assign peaks and improve discrimination of spatially important features. DESI parameters were optimised on an ion trap mass spectrometer for (a) consistent imaging of dried single and mixture spots of insulin, myoglobin and BSA from a Permanox slide, and (b) to produce a MS image of rat brain coronal section at 100 μm resolution. Multivariate curve resolution (MCR), an imaging MVA technique was applied to these images after appropriate data binning. MCR analysis on DESI images of protein mixture spots allowed the multiply charged peaks of a number of proteins to be distinctly separated. Application of MCR to a DESI image of a rat brain coronal section deconvoluted the image into components that showed biologically important features. Further application of MCR to a subsection of the image produced a component that clearly separated out the substantia nigra region, which allowed us to produce a biochemical anatomy for this area of the brain. We have demonstrated the ability of imaging MVA to automatically and objectively analyse DESI images of standardised and complex biological samples, and have shown its capacity for detailed spatial profiling of biomolecules in specific morphological regions. We propose the routine use of this technique for future DESI imaging experiments.
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Affiliation(s)
- Wei Rao
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
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14
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Yao ZP. Characterization of proteins by ambient mass spectrometry. MASS SPECTROMETRY REVIEWS 2012; 31:437-47. [PMID: 21898526 DOI: 10.1002/mas.20346] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 06/07/2011] [Accepted: 06/19/2011] [Indexed: 05/16/2023]
Abstract
Proteins play important roles in living systems and are topics of many fundamental and applied research projects. With the introduction of electrospray ionization and matrix-assisted laser desorption/ionization for analysis of biomacromolecules in the late 1980s, mass spectrometry has become an important tool for characterization of proteins. Characterization of proteins in raw samples by these mass spectrometric techniques, however, usually requires extensive sample pretreatment. Ambient ionization techniques are new mass spectrometric techniques that allow direct analysis of samples with no or little sample preparation. Can these techniques facilitate or even eliminate sample preparation for mass spectrometric analysis of proteins? Apart from sample preparation, do these techniques offer any new features for characterization of proteins as compared with conventional ESI or MALDI? Recent advances in characterization of proteins by ambient mass spectrometry are summarized and commented in this article.
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Affiliation(s)
- Zhong-Ping Yao
- State Key Laboratory for Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, China.
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15
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Campbell DI, Ferreira CR, Eberlin LS, Cooks RG. Improved spatial resolution in the imaging of biological tissue using desorption electrospray ionization. Anal Bioanal Chem 2012; 404:389-98. [PMID: 22706326 DOI: 10.1007/s00216-012-6173-6] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 05/29/2012] [Accepted: 05/30/2012] [Indexed: 01/27/2023]
Abstract
Desorption electrospray ionization imaging allows biomarker discovery and disease diagnosis through chemical characterization of biological samples in their native environment. Optimization of experimental parameters including emitter capillary size, solvent composition, solvent flow rate, mass spectrometry scan-rate and step-size is shown here to improve the resolution available in the study of biological tissue from 180 μm to about 35 μm using an unmodified commercial mass spectrometer. Mouse brain tissue was used to optimize and measure resolution based on known morphological features and their known relationships to major phospholipid components. Features of approximately 35 μm were resolved and correlations drawn between features in grey matter (principally PS (18:0/22:6), m/z 834) and in white matter (principally ST (24:1), m/z 888). The improved spatial resolution allowed characterization of the temporal changes in lipid profiles occurring within mouse ovaries during the ovulatory cycle. An increase in the production of phosphatidylinositol (PI 38:4) m/z 885 and associated fatty acids such as arachidonic acid (FA 20:4) m/z 303 and adrenic acid (FA 22:4) m/z 331was seen with the postovulatory formation of the corpus luteum.
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Affiliation(s)
- Dahlia I Campbell
- Chemistry Department, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA
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16
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D'Aloise P, Chen H. Rapid determination of flunitrazepam in alcoholic beverages by desorption electrospray ionization-mass spectrometry. Sci Justice 2012; 52:2-8. [DOI: 10.1016/j.scijus.2011.08.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 08/10/2011] [Accepted: 08/22/2011] [Indexed: 11/24/2022]
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17
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Thevis M, Volmer DA. Recent instrumental progress in mass spectrometry: advancing resolution, accuracy, and speed of drug detection. Drug Test Anal 2012; 4:242-5. [DOI: 10.1002/dta.344] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 07/25/2011] [Accepted: 07/26/2011] [Indexed: 12/23/2022]
Affiliation(s)
- Mario Thevis
- Institute of Biochemistry - Center for Preventive Doping Research; German Sport University Cologne; Am Sportpark Müngersdorf 6; 50933; Cologne; Germany
| | - Dietrich A. Volmer
- Institute for Bioanalytical Chemistry, Department of Chemistry; Saarland University; 66123; Saarbrücken
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Miao Z, Chen H, Liu P, Liu Y. Development of Submillisecond Time-Resolved Mass Spectrometry Using Desorption Electrospray Ionization. Anal Chem 2011; 83:3994-7. [DOI: 10.1021/ac200842e] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Zhixin Miao
- Department of Chemistry and Biochemistry, Center for Intelligent Chemical Instrumentation, Ohio University, Athens, Ohio 45701, United States
| | - Hao Chen
- Department of Chemistry and Biochemistry, Center for Intelligent Chemical Instrumentation, Ohio University, Athens, Ohio 45701, United States
| | - Pengyuan Liu
- Department of Chemistry and Biochemistry, Center for Intelligent Chemical Instrumentation, Ohio University, Athens, Ohio 45701, United States
| | - Yan Liu
- Department of Chemistry and Biochemistry, Center for Intelligent Chemical Instrumentation, Ohio University, Athens, Ohio 45701, United States
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19
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Wang H, Manicke NE, Yang Q, Zheng L, Shi R, Cooks RG, Ouyang Z. Direct analysis of biological tissue by paper spray mass spectrometry. Anal Chem 2011; 83:1197-201. [PMID: 21247069 PMCID: PMC3039116 DOI: 10.1021/ac103150a] [Citation(s) in RCA: 172] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Paper spray mass spectrometry (PS-MS) is explored as a fast and convenient way for direct analysis of molecules in tissues with minimum sample pretreatment. This technique allows direct detection of different types of compounds such as hormones, lipids, and therapeutic drugs in short total analysis times (less than 1 min) using a small volume of tissue sample (typically 1 mm(3) or less). The tissue sample could be obtained by needle aspiration biopsy, by punch biopsy, or by rubbing a thin tissue section across the paper. There exists potential for the application of paper spray mass spectrometry together with tissue biopsy for clinical diagnostics.
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Affiliation(s)
- He Wang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | | | - Qian Yang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Lingxing Zheng
- Department of Basic Medical Science, School of Veterinary Medicine, Purdue University, West Lafayette, IN 47907, USA
| | - Riyi Shi
- Department of Basic Medical Science, School of Veterinary Medicine, Purdue University, West Lafayette, IN 47907, USA
| | - R. Graham Cooks
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
- Center for Analytical Instrumentation Development, Purdue University, West Lafayette, IN 47907, USA
| | - Zheng Ouyang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
- Center for Analytical Instrumentation Development, Purdue University, West Lafayette, IN 47907, USA
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20
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Ambient desorption ionization mass spectrometry (DART, DESI) and its bioanalytical applications. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s12566-010-0019-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Xu G, Chen B, Guo B, He D, Yao S. Detection of intermediates for the Eschweiler–Clarke reaction by liquid-phase reactive desorption electrospray ionization mass spectrometry. Analyst 2011; 136:2385-90. [DOI: 10.1039/c0an00879f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Molecular mass spectrometry imaging in biomedical and life science research. Histochem Cell Biol 2010; 134:423-43. [DOI: 10.1007/s00418-010-0753-3] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/07/2010] [Indexed: 10/18/2022]
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23
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Przybylski C, Gonnet F, Hersant Y, Bonnaffé D, Lortat-Jacob H, Daniel R. Desorption Electrospray Ionization Mass Spectrometry of Glycosaminoglycans and Their Protein Noncovalent Complex. Anal Chem 2010; 82:9225-33. [DOI: 10.1021/ac1016198] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- C. Przybylski
- CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Laboratoire Analyse et Modélisation pour la Biologie et l’Environnement, F-91025 Evry, France, CNRS UMR 8182, Université d’Orsay, Laboratoire de Chimie Organique Multifonctionnelle, ICMO, 91405 Orsay Cedex, France, and Institut de Biologie Structurale, CNRS, CEA, Université Joseph Fourier, UMR 5075, 38027 Grenoble Cedex, France
| | - F. Gonnet
- CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Laboratoire Analyse et Modélisation pour la Biologie et l’Environnement, F-91025 Evry, France, CNRS UMR 8182, Université d’Orsay, Laboratoire de Chimie Organique Multifonctionnelle, ICMO, 91405 Orsay Cedex, France, and Institut de Biologie Structurale, CNRS, CEA, Université Joseph Fourier, UMR 5075, 38027 Grenoble Cedex, France
| | - Y. Hersant
- CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Laboratoire Analyse et Modélisation pour la Biologie et l’Environnement, F-91025 Evry, France, CNRS UMR 8182, Université d’Orsay, Laboratoire de Chimie Organique Multifonctionnelle, ICMO, 91405 Orsay Cedex, France, and Institut de Biologie Structurale, CNRS, CEA, Université Joseph Fourier, UMR 5075, 38027 Grenoble Cedex, France
| | - D. Bonnaffé
- CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Laboratoire Analyse et Modélisation pour la Biologie et l’Environnement, F-91025 Evry, France, CNRS UMR 8182, Université d’Orsay, Laboratoire de Chimie Organique Multifonctionnelle, ICMO, 91405 Orsay Cedex, France, and Institut de Biologie Structurale, CNRS, CEA, Université Joseph Fourier, UMR 5075, 38027 Grenoble Cedex, France
| | - H. Lortat-Jacob
- CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Laboratoire Analyse et Modélisation pour la Biologie et l’Environnement, F-91025 Evry, France, CNRS UMR 8182, Université d’Orsay, Laboratoire de Chimie Organique Multifonctionnelle, ICMO, 91405 Orsay Cedex, France, and Institut de Biologie Structurale, CNRS, CEA, Université Joseph Fourier, UMR 5075, 38027 Grenoble Cedex, France
| | - R. Daniel
- CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Laboratoire Analyse et Modélisation pour la Biologie et l’Environnement, F-91025 Evry, France, CNRS UMR 8182, Université d’Orsay, Laboratoire de Chimie Organique Multifonctionnelle, ICMO, 91405 Orsay Cedex, France, and Institut de Biologie Structurale, CNRS, CEA, Université Joseph Fourier, UMR 5075, 38027 Grenoble Cedex, France
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24
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Watrous J, Hendricks N, Meehan M, Dorrestein PC. Capturing bacterial metabolic exchange using thin film desorption electrospray ionization-imaging mass spectrometry. Anal Chem 2010; 82:1598-600. [PMID: 20121185 DOI: 10.1021/ac9027388] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Over 60% of current pharmaceutical drugs have origins in natural products. To expand on current methods allowing one to characterize natural products directly from bacterial culture, herein we describe the use of desorption electrospray ionization (DESI) imaging mass spectrometry in monitoring the exchange of secondary metabolites between Bacillus subtilis and Streptomyces coelicolor using a simple imprinting technique.
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25
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Alberici RM, Simas RC, Sanvido GB, Romão W, Lalli PM, Benassi M, Cunha IBS, Eberlin MN. Ambient mass spectrometry: bringing MS into the "real world". Anal Bioanal Chem 2010; 398:265-94. [PMID: 20521143 DOI: 10.1007/s00216-010-3808-3] [Citation(s) in RCA: 222] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 04/26/2010] [Accepted: 04/29/2010] [Indexed: 11/26/2022]
Abstract
Mass spectrometry has recently undergone a second contemporary revolution with the introduction of a new group of desorption/ionization (DI) techniques known collectively as ambient mass spectrometry. Performed in an open atmosphere directly on samples in their natural environments or matrices, or by using auxiliary surfaces, ambient mass spectrometry (MS) has greatly simplified and increased the speed of MS analysis. Since its debut in 2004 there has been explosive growth in the applications and variants of ambient MS, and a very comprehensive set of techniques based on different desorption and ionization mechanisms is now available. Most types of molecules with a large range of masses and polarities can be ionized with great ease and simplicity with the outstanding combination of the speed, selectivity, and sensitivity of MS detection. This review describes and compares the basis of ionization and the concepts of the most promising ambient MS techniques known to date and illustrates, via typical analytical and bioanalytical applications, how ambient MS is helping to bring MS analysis deeper than ever into the "real world" open atmosphere environment--to wherever MS is needed.
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Affiliation(s)
- Rosana M Alberici
- ThoMSon Mass Spectrometry Laboratory, Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP 13083-970, Brazil.
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26
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Manicke N, Dill A, Ifa D, Cooks R. High-resolution tissue imaging on an orbitrap mass spectrometer by desorption electrospray ionization mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2010; 45:223-6. [PMID: 20049747 PMCID: PMC2943738 DOI: 10.1002/jms.1707] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Affiliation(s)
- N.E. Manicke
- Purdue University, Department of Chemistry, West Lafayette, IN 47907, USA
| | - A.L. Dill
- Purdue University, Department of Chemistry, West Lafayette, IN 47907, USA
| | - D.R. Ifa
- Purdue University, Department of Chemistry, West Lafayette, IN 47907, USA
| | - R.G. Cooks
- Purdue University, Department of Chemistry, West Lafayette, IN 47907, USA
- correspondence to:
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27
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Xu G, Chen B, Liu G, Yao S. Rapid analysis of acetone in human plasma by derivatization desorption electrospray ionization. Analyst 2010; 135:2415-9. [DOI: 10.1039/c0an00249f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Emory JF, Walworth MJ, Van Berkel GJ, Schulz M, Minarik S. Direct analysis of reversed-phase high-performance thin layer chromatography separated tryptic protein digests using a liquid microjunction surface sampling probe/electrospray ionization mass spectrometry system. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2010; 16:21-33. [PMID: 20065522 DOI: 10.1255/ejms.1041] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The sampling, ionization and detection of tryptic peptides separated in one-dimension on reversed-phase high-performance thin layer chromatography (HPTLC) plates was performed using liquid microjunction surface sampling probe electrospray ionization mass spectrometry. Tryptic digests of five proteins [cytochrome c, myoglobin, beta-casein, lysozyme and bovine serum albumin (BSA)] were spotted on reversed phase HPTLC RP-8 F254s and HPTLC RP-18 F254s plates. The plates were then developed using 70/30 methanol/water with 0.1M ammonium acetate. A dual purpose extraction/electrospray solution containing 70/30/0.1 water/methanol/formic acid was infused through the sampling probe during analysis of the developed lanes. Both full scan mass spectra and data dependent tandem mass spectra were acquired for each development lane to detect and verify the peptide distributions. Data dependent tandem mass spectra provided both protein identification and sequence coverage information. Highest sequence coverages were achieved for cytochrome c and myoglobin (62.5% and 58.3%, respectively) on reversed phase RP-8 plates. While the tryptic peptides were separated enough for identification, the peptide bands did show some overlap with most peptides located in the lower half of the development lane. Proteins whose peptides were more separated gave higher sequence coverage. Larger proteins such as beta-casein and BSA which were spotted in lower relative amounts gave much lower sequence coverage than the smaller proteins.
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MESH Headings
- Amino Acid Sequence
- Animals
- Caseins/analysis
- Caseins/isolation & purification
- Cattle
- Chickens
- Chromatography, High Pressure Liquid/instrumentation
- Chromatography, High Pressure Liquid/methods
- Chromatography, Reverse-Phase/instrumentation
- Chromatography, Reverse-Phase/methods
- Chromatography, Thin Layer/instrumentation
- Chromatography, Thin Layer/methods
- Cytochromes c/analysis
- Cytochromes c/isolation & purification
- Equipment Design
- Horses
- Molecular Sequence Data
- Muramidase/analysis
- Muramidase/isolation & purification
- Myoglobin/analysis
- Myoglobin/isolation & purification
- Proteins/analysis
- Proteins/isolation & purification
- Serum Albumin, Bovine/analysis
- Serum Albumin, Bovine/isolation & purification
- Spectrometry, Mass, Electrospray Ionization/instrumentation
- Spectrometry, Mass, Electrospray Ionization/methods
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Affiliation(s)
- Joshua F Emory
- Organic and Biological Mass Spectrometry Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6131, USA
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29
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Pól J, Vidová V, Kruppa G, Kobliha V, Novák P, Lemr K, Kotiaho T, Kostiainen R, Havlíček V, Volný M. Automated Ambient Desorption−Ionization Platform for Surface Imaging Integrated with a Commercial Fourier Transform Ion Cyclotron Resonance Mass Spectrometer. Anal Chem 2009; 81:8479-87. [DOI: 10.1021/ac901368q] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jaroslav Pól
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Veronika Vidová
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Gary Kruppa
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Václav Kobliha
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Petr Novák
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Karel Lemr
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Tapio Kotiaho
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Risto Kostiainen
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Vladimír Havlíček
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
| | - Michael Volný
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ-142 20 Prague, Czech Republic, Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014, University of Helsinki, Finland, Department of Analytical Chemistry, Faculty of Science, Palacký University, Tŕ. Svobody 8, CZ-771 46 Olomouc, Czech Republic, and Laboratory of Analytical Chemistry, Department of Chemistry,
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30
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Harry EL, Reynolds JC, Bristow AWT, Wilson ID, Creaser CS. Direct analysis of pharmaceutical formulations from non-bonded reversed-phase thin-layer chromatography plates by desorption electrospray ionisation ion mobility mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2009; 23:2597-2604. [PMID: 19630035 DOI: 10.1002/rcm.4152] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The direct analysis of pharmaceutical formulations and active ingredients from non-bonded reversed-phase thin layer chromatography (RP-TLC) plates by desorption electrospray ionisation (DESI) combined with ion mobility mass spectrometry (IM-MS) is reported. The analysis of formulations containing analgesic (paracetamol), decongestant (ephedrine), opiate (codeine) and stimulant (caffeine) active pharmaceutical ingredients is described, with and without chromatographic development to separate the active ingredients from the excipient formulation. Selectivity was enhanced by combining ion mobility and mass spectrometry to characterise the desorbed gas-phase analyte ions on the basis of mass-to-charge ratio (m/z) and gas-phase ion mobility (drift time). The solvent composition of the DESI spray using a step gradient was varied to optimise the desorption of active pharmaceutical ingredients from the RP-TLC plates. The combined RP-TLC/DESI-IM-MS approach has potential as a rapid and selective technique for pharmaceutical analysis by orthogonal gas-phase electrophoretic and mass-to-charge separation.
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Affiliation(s)
- Emma L Harry
- Centre for Analytical Science, Department of Chemistry, Loughborough University, Loughborough LE11 3TU, UK
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31
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Vidová V, Volný M, Lemr K, Havlíček V. Surface analysis by imaging mass spectrometry. ACTA ACUST UNITED AC 2009. [DOI: 10.1135/cccc2009028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A review of four MS-based techniques available for molecular surface imaging is presented. The main focus is on the commercially available mass spectrometry imaging techniques: secondary ion mass spectrometry (SIMS), matrix assisted laser desorption ionization mass spectrometry (MALDI-MS), desorption electrospray ionization mass spectrometry (DESI-MS) and laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS). A short historical perspective is presented and traditional desorption ionization techniques are also briefly described. The four techniques are compared mainly with respect to their usage for imaging of biological surfaces. MALDI is evaluated as the most successful in life sciences and the only technique usable for imaging of large biopolymers. SIMS is less common but offers superior spatial lateral resolution and DESI is considered to be an emerging alternative approach in mass spectrometry imaging. LA-ICP ionization is unbeatable in terms of limits of detection but does not provide structural information. All techniques are considered extremely useful, representing a new wave of expansion of mass spectrometry into surface science and bioanalysis. A minireview with 121 references.
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32
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Wood MC, Busby DK, Farnsworth PB. Microscopic Imaging of Glass Surfaces under the Effects of Desorption Electrospray Ionization. Anal Chem 2009. [DOI: 10.1021/ac9008868] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael C. Wood
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Devin K. Busby
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Paul B. Farnsworth
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
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33
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Nyadong L, Hohenstein EG, Galhena A, Lane AL, Kubanek J, Sherrill CD, Fernández FM. Reactive desorption electrospray ionization mass spectrometry (DESI-MS) of natural products of a marine alga. Anal Bioanal Chem 2009; 394:245-54. [PMID: 19277616 PMCID: PMC3375022 DOI: 10.1007/s00216-009-2674-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Revised: 01/28/2009] [Accepted: 02/03/2009] [Indexed: 10/21/2022]
Abstract
Presented here is the optimization and development of a desorption electrospray ionization mass spectrometry (DESI-MS) method for detecting natural products on tissue surfaces. Bromophycolides are algal diterpene-benzoate macrolide natural products that have been shown to inhibit growth of the marine fungal pathogen Lindra thalassiae. As such, they have been implicated in antimicrobial chemical defense. However, the defense mechanisms are not yet completely understood. Precise detection of these compounds on algal tissue surfaces under ambient conditions without any disruptive sample processing could shed more light onto the processes involved in chemical defense of marine organisms. Conventional DESI-MS directly on algal tissue showed relatively low sensitivity for bromophycolide detection. Sensitivity was greatly improved by the addition of various anions including Cl(-), Br(-), and CF(3)COO(-) into the DESI spray solvent. Chloride adduction gave the highest sensitivity for all assayed anions. Density functional optimization of the bromophycolide anionic complexes produced during DESI supported this observation by showing that the chloride complex has the most favorable binding energy. Optimized DESI protocols allowed the direct and unambiguous detection of bromophycolides, including A, B, and E, from the surface of untreated algal tissue.
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Affiliation(s)
- Leonard Nyadong
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
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34
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Qiu B, Luo H. Desorption electrospray ionization mass spectrometry of DNA nucleobases: implications for a liquid film model. JOURNAL OF MASS SPECTROMETRY : JMS 2009; 44:772-779. [PMID: 19160433 DOI: 10.1002/jms.1554] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Desorption electrospray ionization (DESI) mass spectrometry has been implemented on a commercial ion-trap mass spectrometer and used to optimize mass spectrometric conditions for DNA nucleobases: adenine, cytosine, thymine, and guanine. Experimental parameters including spray voltage, distance between mass spectrometer inlet and the sampled spot, and nebulizing gas inlet pressure were optimized. Cluster ions including some magic number clusters of nucleobases were observed for the first time using DESI mass spectrometry. The formation of the cluster species was found to vary with the nucleobases, acidification of the spray solvent, and the deposited sample amount. All the experimental results can be explained well using a liquid film model based on the two-step droplet pick-up mechanism. It is further suggested that solubility of the analytes in the spray solvent is an important factor to consider for their studies by using DESI.
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Affiliation(s)
- Bo Qiu
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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35
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Chipuk JE, Brodbelt JS. The influence of material and mesh characteristics on transmission mode desorption electrospray ionization. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2009; 20:584-592. [PMID: 19112027 DOI: 10.1016/j.jasms.2008.11.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 11/19/2008] [Accepted: 11/21/2008] [Indexed: 05/27/2023]
Abstract
Adaptation of desorption electrospray ionization to a transmission mode (TM-DESI) entails passing an electrospray plume through a sample that has been deposited onto a mesh substrate. A combination of mass spectrometry and fluorescence microscopy studies is used to illustrate the critical role material composition, mesh open space, and mesh fiber diameter play on the transmission, desorption, and ionization process. Substrates with open spaces less than 150 microm and accompanying minimal strand diameters produce less scattering of the plume and therefore favor transmission. Larger strand diameters typically encompass larger open spaces, but the increase in the surface area of the strand increases plume scattering as well as solvent and analyte spreading on the mesh. Polypropylene (PP), ethylene tetrafluoroethylene (ETFE), and polyetheretherketone (PEEK) materials afford much better desorption than similarly sized polyethylene terephthalate (PETE) or nylon-6,6 (PA66) substrates. Ultimately, the manner in which the electrospray plume interacts with the mesh as it is transmitted through the substrate is shown to be critical to performing and optimizing TM-DESI analyses. In addition, evidence is presented for analyte dependent variations in the desorption mechanisms of dry and solvated samples.
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Affiliation(s)
- Joseph E Chipuk
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, USA
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36
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Yang S, Ding J, Zheng J, Hu B, Li J, Chen H, Zhou Z, Qiao X. Detection of Melamine in Milk Products by Surface Desorption Atmospheric Pressure Chemical Ionization Mass Spectrometry. Anal Chem 2009; 81:2426-36. [DOI: 10.1021/ac900063u] [Citation(s) in RCA: 245] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuiping Yang
- Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000 P. R. China, College of Chemistry, Jilin University, Changchun, 130023 P. R. China, Beijing Centre for Physical and Chemical Analysis, Beijing 100089, and College of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264000 P. R. China
| | - Jianhua Ding
- Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000 P. R. China, College of Chemistry, Jilin University, Changchun, 130023 P. R. China, Beijing Centre for Physical and Chemical Analysis, Beijing 100089, and College of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264000 P. R. China
| | - Jian Zheng
- Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000 P. R. China, College of Chemistry, Jilin University, Changchun, 130023 P. R. China, Beijing Centre for Physical and Chemical Analysis, Beijing 100089, and College of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264000 P. R. China
| | - Bin Hu
- Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000 P. R. China, College of Chemistry, Jilin University, Changchun, 130023 P. R. China, Beijing Centre for Physical and Chemical Analysis, Beijing 100089, and College of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264000 P. R. China
| | - Jianqiang Li
- Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000 P. R. China, College of Chemistry, Jilin University, Changchun, 130023 P. R. China, Beijing Centre for Physical and Chemical Analysis, Beijing 100089, and College of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264000 P. R. China
| | - Huanwen Chen
- Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000 P. R. China, College of Chemistry, Jilin University, Changchun, 130023 P. R. China, Beijing Centre for Physical and Chemical Analysis, Beijing 100089, and College of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264000 P. R. China
| | - Zhiquan Zhou
- Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000 P. R. China, College of Chemistry, Jilin University, Changchun, 130023 P. R. China, Beijing Centre for Physical and Chemical Analysis, Beijing 100089, and College of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264000 P. R. China
| | - Xiaolin Qiao
- Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000 P. R. China, College of Chemistry, Jilin University, Changchun, 130023 P. R. China, Beijing Centre for Physical and Chemical Analysis, Beijing 100089, and College of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264000 P. R. China
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37
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Pasilis SP, Kertesz V, Van Berkel GJ, Schulz M, Schorcht S. HPTLC/DESI-MS imaging of tryptic protein digests separated in two dimensions. JOURNAL OF MASS SPECTROMETRY : JMS 2008; 43:1627-1635. [PMID: 18563861 DOI: 10.1002/jms.1431] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Desorption electrospray ionization mass spectrometry (DESI-MS) was demonstrated as a method to detect and identify peptides from two-dimensional separations of cytochrome c and myoglobin tryptic digests on ProteoChrom HPTLC Cellulose sheets. Data-dependent tandem mass spectra were acquired during lane scans across the TLC plates. Peptides and the corresponding proteins were identified using a protein database search software. Two-dimensional distributions of identified peptides were mapped for each separated protein digest. Sequence coverages for cytochrome c and myoglobin were 81 and 74%, respectively. These compared well with those determined using the more standard HPLC/ESI-MS/MS approach (89 and 84%, respectively). Preliminary results show that use of more sensitive instrumentation has the potential for improved detection of peptides with low R(f) values and improvement in sequence coverage. However, less multiple charging and more sodiation were seen in HPTLC/DESI-MS spectra relative to HPLC/ESI-MS spectra, which can affect peptide identification by MS/MS. Methods to increase multiple charging and reduce the extent of sodiation are currently under investigation.
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Affiliation(s)
- Sofie P Pasilis
- Organic and Biological Mass Spectrometry Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6131, USA
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38
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Perry RH, Cooks RG, Noll RJ. Orbitrap mass spectrometry: instrumentation, ion motion and applications. MASS SPECTROMETRY REVIEWS 2008; 27:661-99. [PMID: 18683895 DOI: 10.1002/mas.20186] [Citation(s) in RCA: 273] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Since its introduction, the orbitrap has proven to be a robust mass analyzer that can routinely deliver high resolving power and mass accuracy. Unlike conventional ion traps such as the Paul and Penning traps, the orbitrap uses only electrostatic fields to confine and to analyze injected ion populations. In addition, its relatively low cost, simple design and high space-charge capacity make it suitable for tackling complex scientific problems in which high performance is required. This review begins with a brief account of the set of inventions that led to the orbitrap, followed by a qualitative description of ion capture, ion motion in the trap and modes of detection. Various orbitrap instruments, including the commercially available linear ion trap-orbitrap hybrid mass spectrometers, are also discussed with emphasis on the different methods used to inject ions into the trap. Figures of merit such as resolving power, mass accuracy, dynamic range and sensitivity of each type of instrument are compared. In addition, experimental techniques that allow mass-selective manipulation of the motion of confined ions and their potential application in tandem mass spectrometry in the orbitrap are described. Finally, some specific applications are reviewed to illustrate the performance and versatility of the orbitrap mass spectrometers.
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Affiliation(s)
- Richard H Perry
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
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39
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Chipuk JE, Brodbelt JS. Transmission mode desorption electrospray ionization. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:1612-1620. [PMID: 18684639 DOI: 10.1016/j.jasms.2008.07.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 07/01/2008] [Accepted: 07/01/2008] [Indexed: 05/26/2023]
Abstract
A new mode of operation for desorption electrospray ionization (DESI) analysis of liquids or solid residues from evaporated solvents is presented. Unlike traditional DESI, the electrospray is not deflected off of a surface but instead is transmitted through a sampling mesh at a 0 degrees angle between the electrospray tip, sample mesh, and capillary inlet of a mass spectrometer. In this configuration, deposited samples can be analyzed rapidly without rigorous optimization of spray distances or angles and without the preparation time associated with solvent evaporation. The new transmission mode desorption electrospray ionization (TM-DESI) technique is not applicable to bulk materials, but instead is a method designed to simplify the sample preparation process for liquid samples and sample extracts. The technique can reduce analysis time to seconds while consuming only microliters of sample. The results presented summarize the optimization of the technique, highlight key figures of merit for several model compounds, and illustrate potential applications to high throughput screening of liquid mixtures in both extraction solvents and biological matrices.
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Affiliation(s)
- Joseph E Chipuk
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, USA
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40
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Simulated splashes: Elucidating the mechanism of desorption electrospray ionization mass spectrometry. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.08.020] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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41
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Wells JM, Roth MJ, Keil AD, Grossenbacher JW, Justes DR, Patterson GE, Barket DJ. Implementation of DART and DESI ionization on a fieldable mass spectrometer. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:1419-1424. [PMID: 18703351 DOI: 10.1016/j.jasms.2008.06.028] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Revised: 06/30/2008] [Accepted: 06/30/2008] [Indexed: 05/26/2023]
Abstract
A recently developed prototype mobile laboratory mass spectrometer, incorporating an atmospheric pressure ionization (API) interface, is described. This system takes advantage of the small size, lower voltage requirements, and tandem MS abilities of the cylindrical ion trap mass analyzer. The prototype API MS uses small, low-power pumps to fit into a 0.1-m(3) self-contained package weighing <45 kg. This instrument has been adapted to allow rapid interfacing to electrospray ionization, desorption electrospray ionization, and direct analysis in real-time sources. Initial data indicate that these techniques provide rapid detection and identification of compounds for quality control, homeland security, and forensic applications. In addition, this instrument is self-contained and compact, making it ideally extensible to mobile laboratory and field analyses. Initial MS and MS/MS data for analyses of drugs, food, and explosives are presented herein.
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Affiliation(s)
- J Mitchell Wells
- Griffin Analytical Technologies LLC, West Lafayette, Indiana 47906, USA.
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42
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Luykx DMAM, Peters RJB, van Ruth SM, Bouwmeester H. A review of analytical methods for the identification and characterization of nano delivery systems in food. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:8231-8247. [PMID: 18759445 DOI: 10.1021/jf8013926] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Detection and characterization of nano delivery systems is an essential part of understanding the benefits as well as the potential toxicity of these systems in food. This review gives a detailed description of food nano delivery systems based on lipids, proteins, and/or polysaccharides and investigates the current analytical techniques that can be used for the identification and characterization of these delivery systems in food products. The analytical approaches have been subdivided into three groups; separation techniques, imaging techniques, and characterization techniques. The principles of the techniques together with their advantages and drawbacks, and reported applications concerning nano delivery systems, or otherwise related compounds are discussed. The review shows that for a sufficient characterization, the nano delivery systems need to be separated from the food matrix, for which high-performance liquid chromatography or field flow fractionation are the most promising techniques. Subsequently, online photon correlation spectroscopy and mass spectrometry seem to be a convenient combination of techniques to characterize a wide variety of nano delivery systems.
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Affiliation(s)
- Dion M A M Luykx
- Institute of Food Safety, RIKILT, Wageningen UR, P.O. Box 230, 6700 AE Wageningen, The Netherlands
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43
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Kertesz V, Van Berkel GJ. Improved imaging resolution in desorption electrospray ionization mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2008; 22:2639-44. [PMID: 18666197 DOI: 10.1002/rcm.3662] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The imaging resolution of desorption electrospray ionization mass spectrometry (DESI-MS) was investigated using printed patterns on paper and thin-layer chromatography (TLC) plate surfaces. Resolution approaching 40 microm was achieved with a typical DESI-MS setup, which is approximately 5 times better than the best resolution reported previously. This improvement was accomplished with careful control of operational parameters (particularly spray tip-to-surface distance, solvent flow rate, and spacing of lane scans). In addition, an appropriately strong analyte/surface interaction and uniform surface texture on the size scale no larger than the desired imaging resolution were required to achieve this resolution. Overall, conditions providing the smallest possible effective desorption/ionization area in the DESI impact plume region and minimizing the analyte redistribution on the surface during analysis led to improved DESI-MS imaging resolution.
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Affiliation(s)
- Vilmos Kertesz
- Organic and Biological Mass Spectrometry Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6131, USA.
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44
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Dixon RB, Sampson JS, Hawkridge AM, Muddiman DC. Ambient Aerodynamic Ionization Source for Remote Analyte Sampling and Mass Spectrometric Analysis. Anal Chem 2008; 80:5266-71. [DOI: 10.1021/ac800289f] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- R. Brent Dixon
- W. M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695
| | - Jason S. Sampson
- W. M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695
| | - Adam M. Hawkridge
- W. M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695
| | - David C. Muddiman
- W. M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695
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45
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Nefliu M, Smith JN, Venter A, Cooks RG. Internal energy distributions in desorption electrospray ionization (DESI). JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:420-7. [PMID: 18187338 DOI: 10.1016/j.jasms.2007.11.019] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2007] [Revised: 11/27/2007] [Accepted: 11/27/2007] [Indexed: 05/11/2023]
Abstract
The internal energy distributions of typical ions generated by desorption electrospray ionization (DESI) were measured using the "survival yield" method, and compared with corresponding data for electrospray ionization (ESI) and electrosonic spray ionization (ESSI). The results show that the three ionization methods produce populations of ions having internal energy distributions of similar shapes and mean values (1.7-1.9 eV) suggesting similar phenomena, at least in the later stages of the process leading from solvated droplets to gas-phase ions. These data on energetics are consistent with the view that DESI involves "droplet pick-up" (liquid-liquid extraction) followed by ESI-like desolvation and gas-phase ion formation. The effects of various experimental parameters on the degree of fragmentation of p-methoxy-benzylpyridinium ions were compared between DESI and ESSI. The results show similar trends in the survival yields as a function of the nebulizing gas pressure, solvent flow rate, and distance from the sprayer tip to the MS inlet. These observations are consistent with the mechanism noted above and they also enable the user to exercise control over the energetics of the DESI ionization process, through manipulation of external and internal ion source parameters.
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Affiliation(s)
- Marcela Nefliu
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
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47
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Using HPTLC/DESI-MS for peptide identification in 1D separations of tryptic protein digests. Anal Bioanal Chem 2008; 391:317-24. [PMID: 18264700 DOI: 10.1007/s00216-008-1874-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Revised: 01/08/2008] [Accepted: 01/10/2008] [Indexed: 10/22/2022]
Abstract
Desorption electrospray ionization mass spectrometry (DESI-MS) was investigated as a method to detect and identify peptides from tryptic digests of cytochrome c and myoglobin separated on ProteoChrom HPTLC Silica gel 60 F(254s) plates and ProteoChrom HPTLC Cellulose sheets. Full-scan mass spectra and data-dependent tandem mass spectra were acquired in separate plate scans and used to identify peptide ions. Peptide distributions along the development lane were mapped for each separated protein digest. Signal levels ranged over several orders of magnitude. In general, highest signal levels were obtained for the peptides with the highest R (f) values on a plate, while peptides with very low R (f) values were often not detected. Sequence coverages for cytochrome c were 58% for the digest separated on the silica gel plate and 72% for the separation on the cellulose sheet; myoglobin sequence coverages were 62% and 68% on silica gel and cellulose, respectively. Weak correlations between peptide hydrophilicity and R (f) values on the silica gel and cellulose plates were found, with the more hydrophilic peptides having lower R (f) values.
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48
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Takats Z, Kobliha V, Sevcik K, Novak P, Kruppa G, Lemr K, Havlicek V. Characterization of DESI-FTICR mass spectrometry - from ECD to accurate mass tissue analysis. JOURNAL OF MASS SPECTROMETRY : JMS 2008; 43:196-203. [PMID: 17918779 DOI: 10.1002/jms.1285] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Implementation of desorption electrospray ionization (DESI) technique on a 9.4 T Fourier transform ion cyclotron resonance (FTICR) mass spectrometer is described. Desorption electrospray technique is capable of the direct investigation of natural samples without any need for sample preparation or chromatographic separation. Since the DESI mass spectra of natural samples are very complex owing to the lack of preseparation or cleanup, the ideal mass spectrometric analyzer for these applications is a high-resolution instrument such as FTICR mass spectrometer. DESI was implemented by constructing an electronically controlled source framework comprising six linear moving stages and one rotating stage. A three-dimensional linear stage was used to accommodate samples, while another 3D linear stage equipped with rotating stage was used as a spray mount. A modified electrosonic sprayer was used as a primary electrospray device. DESI-FTICR setup was characterized with regard to geometrical, electrical and flow conditions using deposited peptide samples in range of 1-100 pmol gross deposited amount on glass and polymer surfaces. Optimized conditions enabled the routine acquisition of DESI-MS spectra on the instrument at 130 000 resolution in the broadband mode and with comparable sensitivity to data reported in the literature. Since the main significance of DESI-FTICR MS is the combination of intact tissue analysis, the capabilities of the technique were demonstrated by analyzing murine liver samples. Presence of lysophospholipids in the liver tissue was tentatively associated with the lipid metabolism taking place in liver. DESI-FTICR is also a promising technique in the field of peptide analysis due to capability of top-down sequencing using electron capture dissociation. As a proof-of-principle experiment, a small synthetic polypeptide containing 36 amino acids was ionized using DESI and was sequenced in the FTICR by means of ECD (electron capture dissociation) fragmentation. Spectra gave almost full sequence information in agreement with the known amino acid sequence of the species.
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Affiliation(s)
- Zoltan Takats
- Semmelweis University, VIII. Ulloi ut 26, 1085 Budapest, Hungary
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49
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Dixon RB, Muddiman DC, Hawkridge AM, Fedorov AG. Probing the mechanisms of an air amplifier using a LTQ-FT-ICR-MS and fluorescence spectroscopy. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2007; 18:1909-13. [PMID: 17855111 PMCID: PMC2426928 DOI: 10.1016/j.jasms.2007.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Revised: 08/09/2007] [Accepted: 08/10/2007] [Indexed: 05/12/2023]
Abstract
We report the first quantitative assessment of electrosprayed droplet/ion focusing enabled by the use of a voltage-assisted air amplifier between an electrospray ionization emitter and a hybrid linear ion trap Fourier transform ion cyclotron resonance mass spectrometer (ESI-LTQ-FT-ICR-MS). A solution of fluorescent dye was electrosprayed with a stainless steel mesh screen placed in front of the MS inlet capillary acting as a gas-permeable imaging plate for fluorescence spectroscopy. Without use of the air amplifier, no detectable FT-ICR signal was observed, as well as no detectable fluorescence on the screen upon imaging using a fluorescence scanner. When the air amplifier was turned ON while electrospraying the fluorescent dye, FT-ICR mass spectra with high signal to noise ratio were obtained with an average ion injection time of 21 ms for an AGC target value of 5 x 10(5). Imaging of the screen using a fluorescence scanner produced a distinct spot of cross-sectional area approximately 33.5 mm(2) in front of the MS inlet capillary. These experimental results provide direct evidence of aerodynamic focusing of electrosprayed droplets/ions enabled by an air amplifier, resulting in improved electrospray droplet/ion capture efficiency and reduced ion injection time. A second set of experiments was carried out to explore whether the air amplifier assists in desolvation. By electrospraying a mix of quaternary amines, ratios of increasingly hydrophobic molecules were obtained. Observation of the solvophobic effect associated with electrospray ionization resulted in a higher abundance of the hydrophobic molecule. This bias was eliminated when the air amplifier was turned ON and a response indicative of the respective component concentrations of the molecules in the bulk solution was observed.
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Affiliation(s)
- R. Brent Dixon
- W.M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695
| | - David C. Muddiman
- W.M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695
- *Author for Correspondence: David C. Muddiman, Ph.D., W.M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, Phone: 919-513-0084, Fax: 919-513-7993,
| | - Adam M. Hawkridge
- W.M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695
| | - A. G. Fedorov
- G.W. Woodruff School of Mechanical Engineering and Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332
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50
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Bereman MS, Williams TI, Muddiman DC. Carbohydrate analysis by desorption electrospray ionization fourier transform ion cyclotron resonance mass spectrometry. Anal Chem 2007; 79:8812-5. [PMID: 17918969 DOI: 10.1021/ac0713858] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the use of desorption electrospray ionization hybrid Fourier transform ion cyclotron resonance mass spectrometry (DESI-FT-ICR-MS) for the analysis of carbohydrates. Spectra of neat carbohydrates are presented along with their mass measurement accuracies and limits of detection. Furthermore, a comparison is made between the analyses of O-linked glycans from mucin by DESI-FT-ICR-MS and matrix-assisted laser desorption/ionization Fourier transform ion cyclotron resonance mass spectrometry. Finally, glycans from mucin are identified by using the high mass measurement accuracy and tandem MS capabilities afforded by the hybrid FT-ICR-MS platform.
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Affiliation(s)
- Michael S Bereman
- W.M Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, USA
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