1
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Arendowski A. Lipidomic approach to identify Escherichia coli and Shigella spp. by matrix-assisted laser desorption/ionization mass spectrometry. Adv Med Sci 2024; 69:238-247. [PMID: 38670227 DOI: 10.1016/j.advms.2024.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 02/08/2024] [Accepted: 04/23/2024] [Indexed: 04/28/2024]
Abstract
PURPOSE Escherichia coli (E. coli) and Shigella species, being highly similar, present a challenge for differentiation using classical methods such as phenotyping, 16S rRNA sequencing, or protein profiling using matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS). The paper proposes a method for identifying E. coli, S. flexneri, S. sonnei, and S. boydii by augmenting the Bruker Biotyper database with reference spectra of lipid profiles obtained using MALDI MS in the positive mode. MATERIALS/METHODS Lipid extracts were made from cultured E. coli, S. flexneri, S. sonnei and S. boydii using the Bligh & Dyer protocol. MALDI MS spectra in positive ion mode were performed for the extracts. Reference spectra were created from 30 spectra for each bacterium and added to the Bruker Biotyper database. RESULTS Identification of bacteria based on lipid profiles in the Biotyper database gave correct results with scores above 2.49. Statistical analysis of the results by Partial Least Squares-Discriminant Analysis (PLS-DA) showed that it is possible to correctly differentiate the microorganisms studied using the lipidomic approach. A panel of six m/z values was proposed for which the value of the area under the ROC curve is 1, thus enabling the identification of E. coli and S. flexneri with 100 % accuracy. CONCLUSIONS Identification of bacteria from lipid fingerprints obtained by the MALDI MS technique is possible and may become a useful tool in the future, especially for microorganisms that are difficult to distinguish by other methods.
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Affiliation(s)
- Adrian Arendowski
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wileńska 4 Str, Toruń, 87-100, Poland.
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2
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McPartlan MS, Harper CC, Hanozin E, Williams ER. Ion emission from 1-10 MDa salt clusters: individual charge state resolution with charge detection mass spectrometry. Analyst 2024; 149:735-744. [PMID: 38189568 DOI: 10.1039/d3an01913f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Salt cluster ions produced by electrospray ionization are used for mass calibration and fundamental investigations into cluster stability and charge separation processes. However, previous studies have been limited to relatively small clusters owing to the heterogeneity associated with large, multiply-charged clusters that leads to unresolved signals in conventional m/z spectra. Here, charge detection mass spectrometry is used to measure both the mass and charge distributions of positively charged clusters of KCl, CaCl2, and LaCl3 with masses between ∼1 and 10 MDa by dynamically measuring the energy per charge, m/z, charge, and mass of simultaneously trapped individual ions throughout a 1 s trapping time. The extent of remaining hydration on the clusters, determined from the change in the frequency of ion motion with time as a result of residual water loss, follows the order KCl < CaCl2 < LaCl3, and is significantly lower than that of a pure water nanodrop, consistent with tighter water binding to the more highly charged cations in these clusters. The number of ion emission events from these clusters also follows this same trend, indicating that water at the cluster surface facilitates charge loss. A new frequency-based method to determine the magnitude of the charge loss resulting from individual ion emission events clearly resolves losses of +1 and +2 ions. Achieving this individual charge state resolution for ion emission events is an important advance in obtaining information about the late stages of bare gaseous ions formation. Future experiments on more hydrated clusters are expected to lead to a better understanding of ion formation in electrospray ionization.
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Affiliation(s)
- Matthew S McPartlan
- Department of Chemistry, University of California, Berkeley, California, 94720-1460, USA.
| | - Conner C Harper
- Department of Chemistry, University of California, Berkeley, California, 94720-1460, USA.
| | - Emeline Hanozin
- Department of Chemistry, University of California, Berkeley, California, 94720-1460, USA.
| | - Evan R Williams
- Department of Chemistry, University of California, Berkeley, California, 94720-1460, USA.
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3
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Arendowski A, Sibińska E, Miśta W, Fijałkowski P, Złoch M, Gabryś D, Pomastowski P. Study of sample preparation influence on bacterial lipids profile in matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Lipids 2024; 59:13-26. [PMID: 38062798 DOI: 10.1002/lipd.12383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 10/27/2023] [Accepted: 11/22/2023] [Indexed: 01/23/2024]
Abstract
Lipids are one of the cell components therefore it is important to be able to accurately assess them. One of the analytical techniques used to study lipid profiles is matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI TOF MS). The present study attempted to select optimal conditions for sample preparation and MALDI MS analysis of bacterial lipidome in both positive and negative ion modes using different extraction protocols-Folch, Matyash, and Bligh & Dyer, solvents used to apply samples, and matrices such as 9-aminoacridine (9-AA), α-cyano-4-hydroxycinnamic acid (CHCA), 2,5-dihydroxybenzoic acid (DHB), 2-mercaptobenzothiazole (MBT), and 2,4,6-trihydroxyacetophenone (THAP). The obtained results allowed concluding that DHB or CHCA matrices are suitable for lipid analysis in the positive mode, and in the negative mode THAP or 9-AA. The most appropriate protocol for extracting lipids from bacterial cells was the Bligh & Dyer method in both ionization modes. The use of the solvent TA30, which was a mixture of acetonitrile and 0.1% trifluoroacetic acid in water, provided on the spectra a significant number of signals from lipids in all groups analyzed, such as fatty acyls, glycerolipids, and glycerophospholipids.
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Affiliation(s)
- Adrian Arendowski
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Ewelina Sibińska
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
- Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
| | - Wioletta Miśta
- Radiotherapy Department, Maria Sklodowska-Curie National Research Institute of Oncology, Gliwice, Poland
| | - Piotr Fijałkowski
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
- Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
| | - Michał Złoch
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
- Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
| | - Dorota Gabryś
- Radiotherapy Department, Maria Sklodowska-Curie National Research Institute of Oncology, Gliwice, Poland
| | - Paweł Pomastowski
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
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4
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Mielczarek P, Suder P, Kret P, Słowik T, Gibuła-Tarłowska E, Kotlińska JH, Kotsan I, Bodzon-Kulakowska A. Matrix-assisted laser desorption/ionization mass spectrometry imaging sample preparation using wet-interface matrix deposition for lipid analysis. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2023; 37:e9531. [PMID: 37122262 DOI: 10.1002/rcm.9531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/27/2023] [Accepted: 04/27/2023] [Indexed: 06/17/2023]
Abstract
RATIONALE Sample preparation is one of the most crucial steps for matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI). Scientists beginning their study with this technique may be overwhelmed by the variety of matrices, solvents, and concentrations; the methods of their applications; and the lack of widely available knowledge of the effect of these parameters on the results. Here we present in depth the aspects of matrix deposition, which will be helpful for the scientific community. METHODS In this study, we tested several MALDI matrices, such as 2,5-dihydroxybenzoic acid (DHB), norharmane, N-(1-naphthyl)ethylenediamine dihydrochloride (NEDC), and 9-aminoacridine (9AA), using the SunCollect system: wet-interface matrix deposition in the context of lipid analysis. We optimized the number of matrix layers and nozzle settings in terms of spectral intensity and the overall quality of the obtained ion maps. RESULTS Our research presents the effect of the number of matrix layers and nozzle settings on the results and allows for choosing the optimal parameters for the analyses. In positive ionization mode, DHB matrix could be chosen first. In the negative ionization mode, 1,5-diaminonaphthalene matrix produces a higher peak intensity in a lower mass range and seems to provide more information than 9AA. We recommend NEDC for particular processes such as glucose analysis. Compared to the remaining matrices, norharmane shows significant changes in the obtained ion maps. CONCLUSIONS Such a large amount of data allow us to observe an interesting conclusion: the obtained ion image for a particular ion could differ dramatically with a change in the matrix, the solvent composition, or even the number of matrix layers. This must be considered when interpreting the result, impelling us to compare the results obtained with different matrices with caution.
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Affiliation(s)
- Przemysław Mielczarek
- Laboratory of Proteomics and Mass Spectrometry, Maj Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Piotr Suder
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland
| | - Paulina Kret
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland
| | - Tymoteusz Słowik
- Experimental Medicine Center, Medical University of Lublin, Lublin, Poland
| | - Ewa Gibuła-Tarłowska
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Medical University, Lublin, Poland
| | - Jolanta Helena Kotlińska
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Medical University, Lublin, Poland
| | - Igor Kotsan
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland
- Lesya Ukrainka Eastern European National University, Lutsk, Ukraine
| | - Anna Bodzon-Kulakowska
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland
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Mielczarek P, Suder P, Kotsan I, Bodzon-Kulakowska A. The influence of matrix concentration and solvent composition on the results of MALDI MSI, with the aid of wet-interface matrix deposition. JOURNAL OF MASS SPECTROMETRY : JMS 2023; 58:e4916. [PMID: 36959759 DOI: 10.1002/jms.4916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 02/07/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
Imaging mass spectrometry is a powerful technique for the molecular analysis of tissue sections. As in many analytical methods, sample preparation is one of the main and most important steps to obtain results of good quality. Usually, the matrix concentration and solvent composition in different studies are taken for granted without any further consideration. In our studies, we aimed to find how matrix concentration and a type of solvent influence the signal. Moreover, we also aimed to find the relationship between these parameters, how they influence the spectra, and how they influence obtained ion maps. In our experiments, we used SunCollect®, which is a commercially available wet-interface system for matrix deposition. We decided to choose two matrix concentrations (2,5-dihydroxybenzoic acid [DHB]: 15 and 25 mg/mL; 9-aminoacridine [9AA]: 7 and 5 mg/mL) and two different water solutions of solvents in two different percentages for the matrices (DHB: 50% and 70% of methanol [MeOH] and acetonitrile [ACN]; 9AA 70% and 50% of ethanol [EtOH] and MeOH). In the end, the influence of these parameters on obtained spectra and ion maps was assessed.
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Affiliation(s)
- Przemyslaw Mielczarek
- Laboratory of Proteomics and Mass Spectrometry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smetna 12 St., 31-343, Krakow, Poland
| | - Piotr Suder
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, A. Mickiewicza 30 Ave., 30-059, Krakow, Poland
| | - Igor Kotsan
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, A. Mickiewicza 30 Ave., 30-059, Krakow, Poland
| | - Anna Bodzon-Kulakowska
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, A. Mickiewicza 30 Ave., 30-059, Krakow, Poland
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6
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Lippold S, Thavarajah R, Reusch D, Wuhrer M, Nicolardi S. Glycoform analysis of intact erythropoietin by MALDI FT-ICR mass spectrometry. Anal Chim Acta 2021; 1185:339084. [PMID: 34711323 DOI: 10.1016/j.aca.2021.339084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/13/2021] [Accepted: 09/19/2021] [Indexed: 10/20/2022]
Abstract
Recombinant human erythropoietin (EPO) is a complex therapeutic glycoprotein with three N- and one O-glycosylation sites. Glycosylation of EPO influences its safety and efficacy and is defined as a critical quality attribute. Thus, analytical methods for profiling EPO glycosylation are highly demanded. Owing to the complexity of the intact protein, information about EPO glycosylation is commonly derived from released glycan and glycopeptide analysis using mass spectrometry (MS). Alternatively, comprehensive insights into the glycoform heterogeneity of intact EPO are obtained using ESI MS-based methods with or without upfront separation of EPO glycoforms. MALDI MS, typically performed with TOF mass analyzers, has been also used for the analysis of intact EPO but, due to the poor glycoform resolution, has only provided limited glycoform information. Here, we present a MALDI FT-ICR MS method for the glycosylation profiling of intact EPO with improved glycoform resolution and without loss of sialic acid residues commonly observed in MALDI analysis. Three EPO variants were characterized in-depth and up to 199 glycoform compositions were assigned from the evaluation of doubly-charged ions, without any deconvolution of the mass spectra. Key glycosylation features such as sialylation, acetylation, and N-acetyllactosamine repeats were determined and found to agree with previously reported data obtained from orthogonal analyses. The developed method allowed for a fast and straightforward data acquisition and evaluation and can be potentially used for the high-throughput comparison of EPO samples throughout its manufacturing process.
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Affiliation(s)
- Steffen Lippold
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands.
| | - Raashina Thavarajah
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands
| | - Dietmar Reusch
- Pharma Technical Development Penzberg, Roche Diagnostics GmbH, Penzberg, Germany
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands
| | - Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands.
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7
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Jang HJ, Le MUT, Park JH, Chung CG, Shon JG, Lee GS, Moon JH, Lee SB, Choi JS, Lee TG, Yoon S. Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging of Phospholipid Changes in a Drosophila Model of Early Amyotrophic Lateral Sclerosis. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2021; 32:2536-2545. [PMID: 34448582 DOI: 10.1021/jasms.1c00167] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Amyotrophic lateral sclerosis (ALS) is a degenerative disease caused by motor neuron damage in the central nervous system, and it is difficult to diagnose early. Drosophila melanogaster is widely used to investigate disease mechanisms and discover biomarkers because it is easy to induce disease in Drosophila through genetic engineering. We performed matrix-assisted laser desorption/ionization-mass spectrometry imaging (MALDI-MSI) to investigate changes in phospholipid distribution in the brain tissue of an ALS-induced Drosophila model. Fly brain tissues of several hundred micrometers or less were sampled using a fly collar to obtain reproducible tissue sections of similar sizes. MSI of brain tissues of Drosophila cultured for 1 or 10 days showed that the distribution of phospholipids, including phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidic acid (PA), phosphatidylserine (PS), and phosphatidylinositol (PI), was significantly different between the control group and the ALS group. In addition, the lipid profile according to phospholipids differed as the culture time increased from 1 to 10 days. These results suggest that disease indicators based on lipid metabolites can be discovered by performing MALDI-MSI on very small brain tissue samples from the Drosophila disease model to ultimately assess the phospholipid changes that occur in early-stage ALS.
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Affiliation(s)
- Hyun Jun Jang
- Bio-imaging Team, Safety Measurement Institute, Korea Research Institute of Standard and Science (KRISS), Daejeon 34113, Republic of Korea
- Department of Biochemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Minh Uyen Thi Le
- Bio-imaging Team, Safety Measurement Institute, Korea Research Institute of Standard and Science (KRISS), Daejeon 34113, Republic of Korea
- Department of Nano Science, University of Science and Technology (UST), Daejeon 34113, South Korea
| | - Jeong Hyang Park
- Department of Brain & Cognitive Sciences, DGIST, Daegu 42988, Republic of Korea
| | - Chang Geon Chung
- Department of Brain & Cognitive Sciences, DGIST, Daegu 42988, Republic of Korea
| | - Jin Gyeong Shon
- Bio-imaging Team, Safety Measurement Institute, Korea Research Institute of Standard and Science (KRISS), Daejeon 34113, Republic of Korea
| | - Ga Seul Lee
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Jeong Hee Moon
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Sung Bae Lee
- Department of Brain & Cognitive Sciences, DGIST, Daegu 42988, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Tae Geol Lee
- Bio-imaging Team, Safety Measurement Institute, Korea Research Institute of Standard and Science (KRISS), Daejeon 34113, Republic of Korea
| | - Sohee Yoon
- Bio-imaging Team, Safety Measurement Institute, Korea Research Institute of Standard and Science (KRISS), Daejeon 34113, Republic of Korea
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Gross JH. Poly(2-vinylpyridine) as a reference compound for mass calibration in positive-ion matrix-assisted laser desorption/ionization-mass spectrometry on different instrumental platforms. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2021; 27:191-204. [PMID: 34738841 PMCID: PMC8586192 DOI: 10.1177/14690667211055701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
Butyl-terminated poly(2-vinylpyridine) (P2VP), C4H9(C7H7N)nH, is evaluated for use as an external and internal mass calibrant in positive-ion matrix-assisted laser desorption/ionization-mass spectrometry (MALDI-MS). P2VP oligomers covering the m/z 450-4500 range are employed to calibrate a time-of-flight (TOF) mass spectrometer in linear and reflector mode, an ion mobility-quadrupole-time-of-flight (IM-Q-TOF) mass spectrometer, and a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. The proton affinity of P2VPs introduced by the numerous pyridyl groups leads to the almost exclusive formation of [M + H]+ ions with common acidic matrices like α-cyano-4-hydroxycinnamic acid (CHCA) and 2,5-dihydroxybenzoic acid (DHB) as well as with the non-acidic and aprotic matrices 1,8-dihydroxy-10H-anthracen-9-on (dithranol) and 2-[(2E)-3-(4-tert-butylphenyl)-2-methylprop-2-enylidene]malonitrile (DCTB). This prevalence of [M + H]+ ions evenly spaced at Δ(m/z) = 105.0578 renders butyl-terminated P2VP oligomers as convenient mass calibrants. The mass accuracies achieved across various m/z ranges with different mass analyzers and modes of operation are evaluated by using established standard compounds. Results as obtained by internal or external calibration are presented. Further, the compilation of mass reference lists tailored to suit the respective analyzer modes is discussed and those reference files are provided.
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Affiliation(s)
- Jürgen H Gross
- Jürgen H Gross, Institute of Organic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
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9
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Treu A, Römpp A. Matrix ions as internal standard for high mass accuracy matrix-assisted laser desorption/ionization mass spectrometry imaging. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2021; 35:e9110. [PMID: 33880828 DOI: 10.1002/rcm.9110] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/16/2021] [Accepted: 04/18/2021] [Indexed: 06/12/2023]
Abstract
RATIONALE High mass accuracy is indispensable for reliable identification in matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) imaging. Ubiquitous matrix ions can serve as reference masses for mass calibration if their sum formula is known. Here we report an overview of ions generated on tissue by 11 common MALDI matrices for use in internal or external mass calibration. METHODS Matrices covered in this study were applied onto coronal mouse brain sections using a pneumatic sprayer setup. MALDI imaging was performed on a Q Exactive HF orbital trapping mass spectrometer coupled to an AP-SMALDI 10 source. Measurements were conducted with high mass resolution (240 k full width at half maximum at m/z 200) and high mass accuracy with a root mean square mass error of better than 1.5 ppm achieved via internal mass calibration using matrix ions. RESULTS MALDI MS imaging was used to investigate ions generated on tissue by 11 common MALDI matrices. An example of using matrix ions for internal mass calibration in MALDI imaging of drug substances and lipids in murine lung sections is presented. Tables containing the cluster composition, sum formulae, and the measured and theoretical m/z ratios of the identified ions were compiled for each matrix. CONCLUSION Using matrix ions as reference masses for internal and external mass calibration in MALDI MS imaging is an effective and elegant way to achieve sub-ppm mass accuracy as it makes use of ubiquitous signals present in every MALDI MS spectrum without the need for an additional calibration standard.
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Affiliation(s)
- Axel Treu
- Bioanalytical Sciences and Food Analysis, University of Bayreuth, Bayreuth, Germany
| | - Andreas Römpp
- Bioanalytical Sciences and Food Analysis, University of Bayreuth, Bayreuth, Germany
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10
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Gross JH. Saccharose cluster ions as mass calibrants in positive-ion direct analysis in real time-mass spectrometry. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2020; 26:324-331. [PMID: 32921168 DOI: 10.1177/1469066720958535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In positive-ion direct analysis in real time-mass spectrometry (DART-MS), mono-, di, and trisaccharides form [M+NH4]+ ions. Some of them, in addition, yield abundant [Mn+NH4]+ cluster ions (n = 1-6)), and thus, can serve for mass calibration. Saccharose, C12H22O11, the most common sugar, also termed sucrose, is among the [Mn+NH4]+ cluster ion forming species. Saccharose may therefore be employed as a cheap and ubiquitous mass calibration standard. The extent of saccharose cluster ion formation depends on the temperature of the DART gas, sample load, and instrumental parameters like trapping conditions of ions prior to mass analysis. This study identifies optimized experimental conditions and demonstrates the application of saccharose cluster ion-based mass calibration for accurate mass measurements in DART mode on a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer.
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Affiliation(s)
- Jürgen H Gross
- Institute of Organic Chemistry, Heidelberg University, Heidelberg, Germany
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11
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Sun X, Wu P, Zhao C, Zheng F, Hu C, Lu X, Xu G. Protein profiling analysis based on matrix-assisted laser desorption/ionization-Fourier transform ion cyclotron resonance mass spectrometry and its application in typing Streptomyces isolates. Talanta 2020; 208:120439. [PMID: 31816710 DOI: 10.1016/j.talanta.2019.120439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 09/22/2019] [Accepted: 10/03/2019] [Indexed: 10/25/2022]
Abstract
Marine Streptomyces is a potential source of novel bioactive natural products in medicine and agriculture. The current discrimination and screening method of Streptomyces isolates is not accurate and time-consuming, and a novel method is necessary. In this study, a protein profiling method based on an ultrahigh resolution 15 T Matrix-assisted laser desorption/ionization-Fourier transform ion cyclotron resonance mass spectrometry (MALDI-FTICR MS) was established and applied for differentiation and bioactivity screening of marine Streptomyces isolates. To obtain robust protein profiling, the effects of the protein extraction method, the matrix-solvent, the sample deposition mode, and the culture time of isolates on protein profiling were thoroughly studied, the optimal conditions were obtained. To evaluate the performance of the developed MALDI-FTICR MS method, MALDI-time of flight (TOF) MS and 16S rRNA were applied in parallel to analyze 25 marine Streptomyces isolates. We found that the clustering result of MALDI-FTICR MS was more similar to that of 16S rRNA than MALDI-TOF MS. And MALDI-FTICR MS could effectively indicate the antibacterial activity of Streptomyces isolates against three plant pathogenic bacteria including Xanthomonas campestris, Xanthomonas oryzae and Erwinia carotovora. Furthermore, a differential protein/peptide was defined and successfully applied to predict antibacterial activity of blind samples. This study demonstrated that MALDI-FTICR MS has great potential to discriminate and screen complex microorganisms, especially those closely related strains.
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Affiliation(s)
- Xiaoshan Sun
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Peichun Wu
- Marine Bioengineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Chunxia Zhao
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Fujian Zheng
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chunxiu Hu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
| | - Xin Lu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
| | - Guowang Xu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
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Zhao X, Huang Y, Ma G, Liu Y, Guo C, He Q, Wang H, Liao J, Pan Y. Parallel On-Target Derivatization for Mass Calibration and Rapid Profiling of N-Glycans by MALDI-TOF MS. Anal Chem 2019; 92:991-998. [PMID: 31829556 DOI: 10.1021/acs.analchem.9b03932] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Glycosylation is an important post-translational modification of proteins, and abnormal glycosylation is involved in a variety of diseases. Accurate and rapid profiling of N-glycans by matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) is still technically challenging and hampered mainly by mass drift of instrument, manual identification of spectrum peaks, and poor cocrystallization with traditional matrices besides low ionization efficiency of analytes. In the present study, a parallel on-target derivatization strategy (POTDS), on the basis of two rationally combined matrices, i.e., 3-hydrazinobenzoic acid plus DHB (DHB/3HBA) and quinoline-3-carbohydrazide plus DHB (DHB/Q3CH), was proposed for mass calibration and rapid detection of reducing N-glycans. Both DHB/3HBA and DHB/Q3CH show high derivatization efficiency and can improve the ionization efficiency of reducing N-glycans significantly. For mass calibration, in combination with dextrans, DHB/3HBA and DHB/Q3CH prove to be highly sensitive matrices facilitating both MS and MS2 calibration for N-glycans in dual polarities. For rapid identification, the regular mass difference observed for each N-glycan labeled with Q3CH and 3HBA respectively can eliminate the occurrence of false positives and promote automated identification of N-glycans in complex samples. For relative quantitation, the acid-base pair of DHB/Q3CH generates a concentrated cocrystallization of glycan-matrix mixtures at the edge of the droplet uniformly, exhibiting good linearity (R2 > 0.998) and accuracy (RSD ≤ 10%). Furthermore, the established POTDS was successfully utilized to assess N-glycans of serum from HCC patients, revealing potential for biomarker discovery in clinical practice.
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Affiliation(s)
- Xiaoyong Zhao
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Yu Huang
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Ge Ma
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Yaqin Liu
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Cheng Guo
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310009 , China
| | - Quan He
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Huiwen Wang
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Jiancong Liao
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Yuanjiang Pan
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
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13
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O'Rourke MB, Padula MP. An Inexpensive, simple calibration method for MALDI TOF/TOF systems. JOURNAL OF MASS SPECTROMETRY : JMS 2019; 54:1003-1007. [PMID: 31697866 DOI: 10.1002/jms.4467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 10/14/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
The array of analytes that can be measured by MADLI MS has created an equally vast range of calibration mixtures. The inherent problem with this is that acquiring all of them at commercial rates can be prohibitively expensive. With this in mind, we have created a low-cost alternative to the most commonly used peptide calibrants. We were able to achieve an overall 78 ppm mass accuracy across a mass range of 900 to 2500 Da which was comparable to the mass accuracy achievable with commercial peptide mixes and hence has become a viable alternative.
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Affiliation(s)
- Matthew B O'Rourke
- Northern Clinical School, Bowel Cancer and Biomarker Lab, Faculty of Medicine and Health, The University of Sydney Lvl 8, Kolling Institute, Royal North Shore Hospital, Sydney, NSW, 2065, Australia
- Proteomics Core Facility, Faculty of Science, The University of Technology Sydney, Ultimo, Sydney, NSW, 2007, Australia
| | - Matthew P Padula
- Proteomics Core Facility, Faculty of Science, The University of Technology Sydney, Ultimo, Sydney, NSW, 2007, Australia
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14
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Noh SA, Kim SM, Park SH, Kim DJ, Lee JW, Kim YG, Moon JY, Lim SJ, Lee SH, Kim KP. Alterations in Lipid Profile of the Aging Kidney Identified by MALDI Imaging Mass Spectrometry. J Proteome Res 2019; 18:2803-2812. [PMID: 31244212 DOI: 10.1021/acs.jproteome.9b00108] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
During aging, the kidney undergoes functional and physiological changes that are closely affiliated with chronic kidney disease (CKD). There is increasing evidence supporting the role of lipid or lipid-derived mediators in the pathogenesis of CKD and other aging-related diseases. To understand the role of lipids in various metabolic processes during kidney aging, we conducted matrix-assisted laser desorption/ionization-imaging mass spectrometry (MALDI-IMS) analysis in kidneys harvested from young (2 months old, n = 3) and old mice (24 months old, n = 3). MALDI-IMS analysis showed an increase in ceramide level and a decrease in sphingomyelin (SM) and phosphatidylcholine (PC) levels in kidneys of old mice. The increased expression of cPLA2 and SMPD1 protein in aged kidney was confirmed by immunohistochemistry and Western blot analysis. Our MALDI-IMS data showed the altered distribution of lipids in aged kidney as indicative of aging-related functional changes of the kidney. Combined analysis of MALDI-IMS and IHC confirmed lipidomic changes and expression levels of responsible enzymes as well as morphological changes.
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Affiliation(s)
- Sue Ah Noh
- Department of Applied Chemistry, Institute of Natural Science, Global Center for Pharmaceutical Ingredient Materials , Kyung Hee University , Yongin , Republic of Korea
| | - Su-Mi Kim
- Department of Nephrology, School of Medicine , Kyung Hee University , Seoul , Republic of Korea
| | - Seon Hwa Park
- Department of Nephrology, School of Medicine , Kyung Hee University , Seoul , Republic of Korea
| | - Dong-Jin Kim
- Department of Nephrology, School of Medicine , Kyung Hee University , Seoul , Republic of Korea
| | - Joon Won Lee
- Department of Applied Chemistry, Institute of Natural Science, Global Center for Pharmaceutical Ingredient Materials , Kyung Hee University , Yongin , Republic of Korea
| | - Yang Gyun Kim
- Department of Nephrology, School of Medicine , Kyung Hee University , Seoul , Republic of Korea
| | - Ju-Young Moon
- Department of Nephrology, School of Medicine , Kyung Hee University , Seoul , Republic of Korea
| | - Sung-Jig Lim
- Department of Pathology , Kyung Hee University Hospital at Gangdong , Seoul , Republic of Korea
| | - Sang-Ho Lee
- Department of Nephrology, School of Medicine , Kyung Hee University , Seoul , Republic of Korea
| | - Kwang Pyo Kim
- Department of Applied Chemistry, Institute of Natural Science, Global Center for Pharmaceutical Ingredient Materials , Kyung Hee University , Yongin , Republic of Korea.,Department of Biomedical Science and Technology, Kyung Hee Medical Science Research Institute , Kyung Hee University , Seoul , Republic of Korea
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15
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Baksi A, Chakraborty P, Nag A, Ghosh D, Bhat S, Pradeep T. Monolayer-Protected Noble-Metal Clusters as Potential Standards for Negative-Ion Mass Spectrometry. Anal Chem 2018; 90:11351-11357. [DOI: 10.1021/acs.analchem.8b02280] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ananya Baksi
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Papri Chakraborty
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Abhijit Nag
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Debasmita Ghosh
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Shridevi Bhat
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Thalappil Pradeep
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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16
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Neugebauer TS, Franz M, Frankenberger S, Tykwinski RR, Drewello T. Laser desorption vs. electrospray of polyyne-threaded rotaxanes: Preventing covalent cross-linking and promoting noncovalent aggregation. J Chem Phys 2018; 148:064308. [PMID: 29448797 DOI: 10.1063/1.5013123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Laser-induced cross-linking of polyynes is successfully hindered when the polyyne is encapsulated as part of a rotaxane and therefore protected by a surrounding macrocycle. When the rotaxane is electrosprayed, however, noncovalent aggregate ions are efficiently formed. Aggregates of considerable size (including more than 50 rotaxane molecules with masses beyond 100k Da) and charge states (up to 13 charges and beyond) have been observed. Either protons or sodium cations act as the charge carriers. These aggregates are not formed when the individual components of the rotaxane, i.e., the macrocycle or the polyyne, are separately electrosprayed. This underlines the structural importance of the rotaxane for the aggregate formation. Straightforward force field calculations indicate that the polyyne thread hinders the folding of the macrocycles, which facilitates the bonding interaction between the two components.
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Affiliation(s)
- Thomas S Neugebauer
- Physical Chemistry I, Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Michael Franz
- Organic Chemistry I, Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, Henkestraße 42, 91054 Erlangen, Germany
| | - Stephanie Frankenberger
- Organic Chemistry I, Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, Henkestraße 42, 91054 Erlangen, Germany
| | - Rik R Tykwinski
- Organic Chemistry I, Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, Henkestraße 42, 91054 Erlangen, Germany
| | - Thomas Drewello
- Physical Chemistry I, Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, Egerlandstrasse 3, 91058 Erlangen, Germany
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17
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Lou X, Li B, de Waal BFM, Schill J, Baker MB, Bovee RAA, van Dongen JLJ, Milroy LG, Meijer EW. Fragmentation of organic ions bearing fixed multiple charges observed in MALDI MS. JOURNAL OF MASS SPECTROMETRY : JMS 2018; 53:39-47. [PMID: 28963745 DOI: 10.1002/jms.4035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 09/11/2017] [Accepted: 09/20/2017] [Indexed: 06/07/2023]
Abstract
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI TOF MS) was used to analyze a series of synthetic organic ions bearing fixed multiple charges. Despite the multiple intrinsic charges, only singly charged ions were recorded in each case. In addition to the pseudo-molecular ions formed by counterion adduction, deprotonation and electron capture, a number of fragment ions were also observed. Charge splitting by fragmentation was found to be a viable route for charge reduction leading to the formation of the observed singly charged fragment ions. Unlike multivalent metal ions, organic ions can rearrange and/or fragment during charge reduction. This fragmentation process will evidently complicate the interpretation of the MALDI MS spectrum. Because MALDI MS is usually considered as a soft ionization technique, the fragment ion peaks can easily be erroneously interpreted as impurities. Therefore, the awareness and understanding of the underlying MALDI-induced fragmentation pathways is essential for a proper interpretation of the corresponding mass spectra. Due to the fragment ions generated during charge reduction, special care should be taken in the MALDI MS analysis of multiply charged ions. In this work, the possible mechanisms by which the organic ions bearing fixed multiple charges fragment are investigated. With an improved understanding of the fragmentation mechanisms, MALDI TOF MS should still be a useful technique for the characterization of organic ions with fixed multiple charges.
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Affiliation(s)
- Xianwen Lou
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Bao Li
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Bas F M de Waal
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Jurgen Schill
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Matthew B Baker
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Ralf A A Bovee
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Joost L J van Dongen
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
- Institute of Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - E W Meijer
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
- Institute of Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
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18
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Mawale RM, Ausekar MV, Prokeš L, Nazabal V, Baudet E, Halenkovič T, Bouška M, Alberti M, Němec P, Havel J. Laser Desorption Ionization of As 2Ch 3 (Ch = S, Se, and Te) Chalcogenides Using Quadrupole Ion Trap Time-of-Flight Mass Spectrometry: A Comparative Study. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:2569-2579. [PMID: 28852994 DOI: 10.1007/s13361-017-1785-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/10/2017] [Accepted: 08/10/2017] [Indexed: 05/23/2023]
Abstract
Laser desorption ionization using time-of-flight mass spectrometer afforded with quadrupole ion trap was used to study As2Ch3 (Ch = S, Se, and Te) bulk chalcogenide materials. The main goal of the study is the identification of species present in the plasma originating from the interaction of laser pulses with solid state material. The generated clusters in both positive and negative ion mode are identified as 10 unary (S p+/- and As m+/- ) and 34 binary (As m S p+/- ) species for As2S3 glass, 2 unary (Se q+/- ) and 26 binary (As m Se q+/- ) species for As2Se3 glass, 7 unary (Te r+/- ) and 23 binary (As m Te r+/- ) species for As2Te3 material. The fragmentation of chalcogenide materials was diminished using some polymers and in this way 45 new, higher mass clusters have been detected. This novel approach opens a new possibility for laser desorption ionization mass spectrometry analysis of chalcogenides as well as other materials. Graphical abstract ᅟ.
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Affiliation(s)
- Ravi Madhukar Mawale
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A14, 625 00, Brno, Czech Republic
| | - Mayuri Vilas Ausekar
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A14, 625 00, Brno, Czech Republic
| | - Lubomír Prokeš
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A14, 625 00, Brno, Czech Republic
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
- CEPLANT, R&D Center for low-cost plasma and nanotechnology surface modifications, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
| | - Virginie Nazabal
- ISCR, Glasses and Ceramics team, UMR-CNRS 6226, University of Rennes 1, 35042, Rennes, France
- Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210, Pardubice, Czech Republic
| | - Emeline Baudet
- Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210, Pardubice, Czech Republic
| | - Tomáš Halenkovič
- Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210, Pardubice, Czech Republic
| | - Marek Bouška
- Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210, Pardubice, Czech Republic
| | - Milan Alberti
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
| | - Petr Němec
- Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210, Pardubice, Czech Republic
| | - Josef Havel
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A14, 625 00, Brno, Czech Republic.
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19
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Gross JH. Basic poly(propylene glycols) as reference compounds for internal mass calibration in positive-ion matrix-assisted laser desorption/ionization mass spectrometry. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2017; 23:411-416. [PMID: 29183190 DOI: 10.1177/1469066717726485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Basic poly(propylene glycols), commercially available under the trade name Jeffamine, are evaluated for their potential use as internal mass calibrants in matrix-assisted laser desorption/ionization-time-of-flight-mass spectrometry. Due to their basic amino endgroups Jeffamines are expected to deliver [M+H]+ ions in higher yields than neutral poly(propylene glycols) or poly(ethylene glycols). Aiming at accurate mass measurements and molecular formula determinations by matrix-assisted laser desorption/ionization-time-of-flight-mass spectrometry, four Jeffamines (M-600, M-2005, D-400, D-230) were thus compared. As a result, Jeffamine M-2005 is introduced as a new mass calibrant for positive-ion matrix-assisted laser desorption/ionization-time-of-flight-mass spectrometry in the range of m/z 200-1200 and the reference mass list is provided. While Jeffamine M-2005 is compatible with α-cyano-4-hydroxycinnamic acid, 2,5-dihydroxybenzoic acid, and 2-[(2 E)-3-(4- tert-butylphenyl)-2-methylprop-2-enylidene]malonitrile matrix, its use in combination with 2-[(2 E)-3-(4- tert-butylphenyl)-2-methylprop-2-enylidene]malonitrile provides best results due to low laser fluence requirements. Applications to PEG 300, PEG 600, the ionic liquid trihexyl(tetradecyl)-phosphonium tris(pentafluoroethyl)-trifluorophosphate, and [60]fullerene demonstrate mass accuracies of 2-5 ppm.
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Affiliation(s)
- Jürgen H Gross
- Institute of Organic Chemistry, Heidelberg University, Heidelberg, Germany
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20
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Kolářová L, Prokeš L, Kučera L, Hampl A, Peňa-Méndez E, Vaňhara P, Havel J. Clusters of Monoisotopic Elements for Calibration in (TOF) Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:419-427. [PMID: 27995502 DOI: 10.1007/s13361-016-1567-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 11/22/2016] [Accepted: 11/25/2016] [Indexed: 05/23/2023]
Abstract
Precise calibration in TOF MS requires suitable and reliable standards, which are not always available for high masses. We evaluated inorganic clusters of the monoisotopic elements gold and phosphorus (Au n+/Au n- and P n+/P n-) as an alternative to peptides or proteins for the external and internal calibration of mass spectra in various experimental and instrumental scenarios. Monoisotopic gold or phosphorus clusters can be easily generated in situ from suitable precursors by laser desorption/ionization (LDI) or matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). Their use offers numerous advantages, including simplicity of preparation, biological inertness, and exact mass determination even at lower mass resolution. We used citrate-stabilized gold nanoparticles to generate gold calibration clusters, and red phosphorus powder to generate phosphorus clusters. Both elements can be added to samples to perform internal calibration up to mass-to-charge (m/z) 10-15,000 without significantly interfering with the analyte. We demonstrated the use of the gold and phosphorous clusters in the MS analysis of complex biological samples, including microbial standards and total extracts of mouse embryonic fibroblasts. We believe that clusters of monoisotopic elements could be used as generally applicable calibrants for complex biological samples. Graphical Abstract ᅟ.
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Affiliation(s)
- Lenka Kolářová
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A14, 625 00, Brno, Czech Republic
| | - Lubomír Prokeš
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A14, 625 00, Brno, Czech Republic
| | - Lukáš Kučera
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 656 91, Brno, Czech Republic
| | - Aleš Hampl
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 656 91, Brno, Czech Republic
| | - Eladia Peňa-Méndez
- Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206, La Laguna, Spain
| | - Petr Vaňhara
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 656 91, Brno, Czech Republic
| | - Josef Havel
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A14, 625 00, Brno, Czech Republic.
- International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 656 91, Brno, Czech Republic.
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Prenzel D, Kirschbaum RW, Chalifoux WA, McDonald R, Ferguson MJ, Drewello T, Tykwinski RR. Polymerization of acetylene: polyynes, but not carbyne. Org Chem Front 2017. [DOI: 10.1039/c6qo00648e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymerization of acetylene in the presence of sterically-hindered endgroups leads to polyynes, but with lengths shorter than by stepwise syntheses.
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Affiliation(s)
- Dominik Prenzel
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) University of Erlangen-Nuremberg (FAU)
- 91054 Erlangen
- Germany
| | - Rolf W. Kirschbaum
- Department of Chemistry and Pharmacy & Interdisclipinary Center for Molecular Materials (ICMM) University of Erlangen-Nuremberg (FAU)
- 91058 Erlangen
- Germany
| | | | | | | | - Thomas Drewello
- Department of Chemistry and Pharmacy & Interdisclipinary Center for Molecular Materials (ICMM) University of Erlangen-Nuremberg (FAU)
- 91058 Erlangen
- Germany
| | - Rik R. Tykwinski
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) University of Erlangen-Nuremberg (FAU)
- 91054 Erlangen
- Germany
- Department of Chemistry
- University of Alberta
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22
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23
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Lungerich D, Hitzenberger JF, Donaubauer W, Drewello T, Jux N. Three Short Stories about Hexaarylbenzene-Porphyrin Scaffolds. Chemistry 2016; 22:16755-16759. [DOI: 10.1002/chem.201603789] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Dominik Lungerich
- Department Chemie und Pharmazie &; Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Jakob F. Hitzenberger
- Department Chemie und Pharmazie; Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Wolfgang Donaubauer
- Department Chemie und Pharmazie &; Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Thomas Drewello
- Department Chemie und Pharmazie; Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Norbert Jux
- Department Chemie und Pharmazie &; Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
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24
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Improved procedure for dendrimer-based mass calibration in matrix-assisted laser desorption/ionization-time-of-flight-mass spectrometry. Anal Bioanal Chem 2016; 408:5945-5951. [DOI: 10.1007/s00216-016-9714-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/06/2016] [Accepted: 06/10/2016] [Indexed: 10/21/2022]
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25
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Hoffmann V, Jenny N, Häussinger D, Neuburger M, Mayor M. Rotationally Restricted 1,1′-Bis(phenylethynyl)ferrocene Subunits in Macrocycles. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600158] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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26
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Gruendling T, Sauerland V, Barahona C, Herz C, Nitsch U. Polyalanine - a practical polypeptide mass calibration standard for matrix-assisted laser desorption/ionization mass spectrometry and tandem mass spectrometry in positive and negative mode. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:681-683. [PMID: 26864519 DOI: 10.1002/rcm.7492] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 12/17/2015] [Accepted: 12/18/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE Mass calibration in matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) is currently obtained using mixtures of individual peptides. This procedure has several drawbacks, including laborious preparation, limited shelf life and unequal calibration mass spacing. Polyalanine, a simple to prepare polydisperse molar mass standard, alleviates these problems. METHODS Polyalanine is prepared by the typical protocols for biological sample analytics. RESULTS Polyalanine is the first polymeric standard providing abundant signals in both, positive and negative polarity mode with the typical matrices DHB and HCCA. CONCLUSIONS Facile MS as well as MS/MS calibration is thus enabled for the first time in both polarity modes by employing this polydisperse standard.
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Affiliation(s)
| | | | | | - Corinna Herz
- Competence Center Analytics, BASF SE, Ludwigshafen, Germany
| | - Ute Nitsch
- Competence Center Analytics, BASF SE, Ludwigshafen, Germany
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Gross JH. Letter: High-mass capabilities of positive-ion and negative-ion direct analysis in real time mass spectrometry. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2016; 22:43-48. [PMID: 26863075 DOI: 10.1255/ejms.1409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Of the ionic liquid 1-butyl-3-methylimidazolium (C(+)) tricyanomethide (A(-)) high-mass cluster ions of both positive ([C(n)A(n-1)](+)) and negative ([C(n-1)A(n)](-)) charge were generated and detected by direct analysis in real time (DART) Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS). After optimization of the settings of the DART ionization source and of the mass analyzer ions of m/z values unprecedented in DART-MS were detected. Thus, the upper m/z limits of positive-ion and negative-ion DART- MS were substantially expanded. Negative-ion DART-MS delivered cluster ions up to [C(15)A(16)](-), m/z 3527 (nominal mass of monoisotopic ion), while positive-ion DART-MS even yielded ions up to [C(30)A(29)](+), m/z 6784. The identification of the cluster ions is supported by their accurate mass and exact mass differences corresponding to CA between adjacent cluster ion peaks.
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Affiliation(s)
- Jürgen H Gross
- Institute of Organic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg Germany.
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Grishin ID, Agafonova KS. Study of ferrocene derivatives Fe(C5H4X)(C5H5−n Y n ) by cyclic voltammetry and matrix-activated laser desorption/ionization time-of-flight mass spectrometry. Russ Chem Bull 2015. [DOI: 10.1007/s11172-014-0536-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Casey BK, Grayson SM. Letter: The potential of amine-containing dendrimer mass standards for internal calibration of peptides. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2015; 21:747-752. [PMID: 26579931 DOI: 10.1255/ejms.1394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In order to ensure accurate mass determinations, MALDI-TOF mass spectrometers must be calibrated regularly. While peptides and proteins represent the most widely used calibration standards due to their monodispersity, known masses and availability, their limited shelf-life complicates their use. Recently, polyester dendrimer calibrants have been introduced as an alternative because, in addition to monodispersity and relative molecular masses as high as 30,000, they exhibit vastly improved stability and broad compatibility with both matrices and solvents. However, the use of these initially reported polyester dendrimers as internal calibrants for the analysis of peptides or proteins presents a unique problem because these dendrimers typically require ionization with metal cations, while amino acid-based compounds preferentially ionize via protonation of an amine. To address this complication, dendrimers bearing a single amine were prepared which demonstrate the ability to easily ionize via protonation with either acidic matrices or dilute solutions of trifluoroacetic acid. This class of amine-containing dendrimers shows promise as a calibrant system specifically designed for the internal calibration of peptides.
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Affiliation(s)
- Brittany K Casey
- Department of Chemistry, Tulane University, New Orleans, LA 70118, USA.
| | - Scott M Grayson
- Department of Chemistry, Tulane University, New Orleans, LA 70118, USA.
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Mochizuki S. Effective methods for the measurement of CsI cluster ions using MALDI-MS with suitable solvent combinations and additives. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:1199-1202. [PMID: 25395136 DOI: 10.1002/jms.3446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 07/17/2014] [Accepted: 07/18/2014] [Indexed: 06/04/2023]
Abstract
A method to measure CsI cluster ions ((CsI)(n)Cs(+), (CsI)(n)I(-)) from CsI samples in matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) was developed with a 2-[(2E)-3-(4-tert-butylphenyl)-2-methylprop-2-enylidene] malononitrile (DCTB) matrix and additives. Solvent combinations in which the CsI and DCTB solutions were miscible were effective in detecting CsI cluster ions at a mass range of over m/z 2000 and are associated with a characteristic spread of DCTB within the CsI/DCTB mixture. The addition of saccharides or sugar alcohols to the CsI/DCTB mixture improved the DCTB distribution and widened the mass distribution of CsI cluster ions up to m/z 10,000 in the linear mode.
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Affiliation(s)
- Shunsuke Mochizuki
- Instrumental Analysis Group, Technical Division, School of Engineering, Tohoku University, 6-6-11, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
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Grayson SM, Myers BK, Bengtsson J, Malkoch M. Advantages of monodisperse and chemically robust "SpheriCal" polyester dendrimers as a "universal" MS calibrant. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2014; 25:303-309. [PMID: 24297473 DOI: 10.1007/s13361-013-0777-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 10/11/2013] [Accepted: 10/22/2013] [Indexed: 06/02/2023]
Abstract
The utilization of dendrimer calibrants as an alternative to peptides and proteins for high mass calibration is explored. These synthetic macromolecules exhibited a number of attractive advantages, including exceptional shelf-lives, broad compatibility with a wide range of matrices and solvents, and evenly spaced calibration masses across the mass range examined, 700-30,000 u. The exceptional purity of these dendrimers and the technical simplicity of this calibration platform validate their broad relevance for high molecular weight mass spectrometry.
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Affiliation(s)
- Scott M Grayson
- Department of Chemistry, Tulane University, New Orleans, LA, 70118, USA,
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