1
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Chen Y, Chen P, Cao Y, Hua L, Li H. Ion Optical Optimization Method for an Ultrahigh Resolution Planar Multireflection Time-of-Flight Mass Analyzer Using the Hill Climbing Algorithm. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:575-581. [PMID: 38321587 DOI: 10.1021/jasms.3c00417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
A novel ion optical optimization method for planar multireflection time-of-flight mass spectrometry (MR-TOFMS) is introduced in this paper. The multiparameters of the gridless mirror model, including geometric and voltage parameters, are automatically optimized using a self-made program created in SIMION 8.1. Combining with the hill climbing algorithm and parallel computing technique, this method substantially enhances optimization efficiency and accuracy. The fitting results demonstrated that the ion optical performance of the gridless mirror reached up to fourth-order isochronicity with respect to the energy spread and third-order isochronicity with respect to the spatial and angular spread. As a result, the gridless mirror model achieved an aberration limit resolution of 1.7 million under realistic ion beam conditions. Due to constraints of periodic lenses, the aberration limit resolution of the planar MR-TOFMS was optimized to 600k. These results indicate that the hill climbing algorithm is an effective method to search the optimal solutions in complex ion optical systems.
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Affiliation(s)
- Yi Chen
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- Liaoning Key Laboratory for Mass Spectrometry Technology and Instrumentation, Dalian 116023, People's Republic of China
- Dalian Key Laboratory for Online Analytical Instrumentation, Dalian 116023, People's Republic of China
| | - Ping Chen
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
- Liaoning Key Laboratory for Mass Spectrometry Technology and Instrumentation, Dalian 116023, People's Republic of China
- Dalian Key Laboratory for Online Analytical Instrumentation, Dalian 116023, People's Republic of China
| | - Yixue Cao
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
- Liaoning Key Laboratory for Mass Spectrometry Technology and Instrumentation, Dalian 116023, People's Republic of China
- Dalian Key Laboratory for Online Analytical Instrumentation, Dalian 116023, People's Republic of China
| | - Lei Hua
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
- Liaoning Key Laboratory for Mass Spectrometry Technology and Instrumentation, Dalian 116023, People's Republic of China
- Dalian Key Laboratory for Online Analytical Instrumentation, Dalian 116023, People's Republic of China
| | - Haiyang Li
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
- Liaoning Key Laboratory for Mass Spectrometry Technology and Instrumentation, Dalian 116023, People's Republic of China
- Dalian Key Laboratory for Online Analytical Instrumentation, Dalian 116023, People's Republic of China
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2
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Downard KM. 25 Years Responding to Respiratory and Other Viruses with Mass Spectrometry. Mass Spectrom (Tokyo) 2023; 12:A0136. [PMID: 38053835 PMCID: PMC10694638 DOI: 10.5702/massspectrometry.a0136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 10/24/2023] [Indexed: 12/07/2023] Open
Abstract
This review article presents the development and application of mass spectrometry (MS) approaches, developed in the author's laboratory over the past 25 years, to detect; characterise, type and subtype; and distinguish major variants and subvariants of respiratory viruses such as influenza and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). All features make use of matrix-assisted laser desorption ionisation (MALDI) mass maps, recorded for individual viral proteins or whole virus digests. A MALDI-based immunoassay in which antibody-peptide complexes were preserved on conventional MALDI targets without their immobilisation led to an approach that enabled their indirect detection. The site of binding, and thus the molecular antigenicity of viruses, could be determined. The same approach was employed to study antivirals bound to their target viral protein, the nature of the binding residues, and relative binding affinities. The benefits of high-resolution MS were exploited to detect sequence-conserved signature peptides of unique mass within whole virus and single protein digests. These enabled viruses to be typed, subtyped, their lineage determined, and variants and subvariants to be distinguished. Their detection using selected ion monitoring improved analytical sensitivity limits to aid the identification of viruses in clinical specimens. The same high-resolution mass map data, for a wide range of viral strains, were input into a purpose-built algorithm (MassTree) in order to both chart and interrogate viral evolution. Without the need for gene or protein sequences, or any sequence alignment, this phylonumerics approach also determines and displays single-point mutations associated with viral protein evolution in a single-tree building step.
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Affiliation(s)
- Kevin M. Downard
- Infectious Disease Responses Laboratory, Prince of Wales Clinical Research Sciences, Sydney, NSW, Australia
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3
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Kitagawa K, Fujihara A, Yatsuhashi T. Charge-Dependent Metastable Dissociations of Multiply Charged Decafluorobiphenyl Formed by Femtosecond Laser Pulses. Mass Spectrom (Tokyo) 2023; 12:A0130. [PMID: 37799935 PMCID: PMC10548501 DOI: 10.5702/massspectrometry.a0130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 09/11/2023] [Indexed: 10/07/2023] Open
Abstract
Femtosecond laser ionization is a unique means to produce multiply charged organic molecules in the gas phase. The charge-dependent chemical reactions of such electron-deficient molecules are interesting from both fundamental and applied scientific perspectives. We have reported the production of quadruply charged perfluoroaromatics; however, they were so stable that we cannot obtain information about their chemical reactions. In general, it might be difficult to realize the conflicting objectives of observing multiply charged molecular ion themselves and their metastable dissociations. In this study, we report the first example showing metastable dissociations of several charge states within the measurable time range of a time-of-flight mass spectrometer. Metastable dissociations were analyzed by selecting a precursor ion with a Bradbury-Nielsen ion gate followed by time-of-flight analysis using a reflectron. We obtained qualitative information that triply and quadruply charged decafluorobiphenyl survived at least in the acceleration region but completely decomposed before entering a reflectron. In contrast, three dissociation channels for singly and one for doubly charged molecular ions were discriminated by a reflectron and determined with the help of ion trajectory simulations.
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Affiliation(s)
- Kosei Kitagawa
- Department of Chemistry, Graduate School of Science, Osaka City University, 3–3–138 Sugimoto, Sumiyoshi-ku, Osaka 558–8585, Japan
| | - Akimasa Fujihara
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3–3–138 Sugimoto, Sumiyoshi-ku, Osaka 558–8585, Japan
| | - Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3–3–138 Sugimoto, Sumiyoshi-ku, Osaka 558–8585, Japan
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4
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Hoyle JS, Downard KM. High resolution mass spectrometry of respiratory viruses: beyond MALDI-ToF instruments for next generation viral typing, subtyping, variant and sub-variant identification. Analyst 2023; 148:4263-4273. [PMID: 37587867 DOI: 10.1039/d3an00953j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
In the wake of the SARS-CoV2 pandemic, a point has been reached to assess the limitations and strengths of the analytical responses to virus identification and characterisation. Mass spectrometry has played a growing role in this area for over two decades, and this review highlights the benefits of mass spectrometry (MS) over PCR-based methods together with advantages of high mass resolution, high mass accuracy strategies over conventional MALDI-ToF and ESI-MS/MS instrumentation. This review presents the development and application of high resolution mass spectrometry approaches to detect, characterise, type and subtype, and distinguish variants of the influenza and SARS-CoV-2 respiratory viruses. The detection limits for the identification of SARS-CoV2 virus variants in clinical specimens and the future uptake of high resolution instruments in clinical laboratories are discussed. The same high resolution mass data can be used to monitor viral evolution and follow evolutionary trajectories.
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Affiliation(s)
- Joshua S Hoyle
- Infectious Disease Responses Laboratory, Prince of Wales Clinical Research Sciences, Sydney, Australia.
| | - Kevin M Downard
- Infectious Disease Responses Laboratory, Prince of Wales Clinical Research Sciences, Sydney, Australia.
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5
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Wood D, Burleigh RJ, Smith N, Bortoletto D, Brouard M, Burt M, Nomerotski A, Plackett R, Shipsey I. Ion Microscope Imaging Mass Spectrometry Using a Timepix3-Based Optical Camera. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:2328-2332. [PMID: 36383767 PMCID: PMC9732873 DOI: 10.1021/jasms.2c00223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/24/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
Ion microscopy allows for high-throughput mass spectrometry imaging. In order to resolve congested mass spectra, a high degree of timing precision is required from the microscope detector. In this paper we present an ion microscope mass spectrometer that uses a Timepix3 hybrid pixel readout with an optimal 1.56 ns resolution. A novel triggering technique is also employed to remove the need for an external time-to-digital converter (TDC) and allow the experiment to be performed using a low-cost and commercially available readout system. Results obtained from samples of rhodamine B demonstrate the application of multimass imaging sensors for microscope mass spectrometry imaging with high mass resolution.
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Affiliation(s)
- Daniel Wood
- Robert
Hooke Building, Department of Physics, University
of Oxford, Parks Road, OxfordOX1
3PP, United Kingdom
| | - Robert J. Burleigh
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OxfordOX1 3TA, United Kingdom
| | - Natasha Smith
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OxfordOX1 3TA, United Kingdom
| | - Daniela Bortoletto
- Robert
Hooke Building, Department of Physics, University
of Oxford, Parks Road, OxfordOX1
3PP, United Kingdom
| | - Mark Brouard
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OxfordOX1 3TA, United Kingdom
| | - Michael Burt
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OxfordOX1 3TA, United Kingdom
| | | | - Richard Plackett
- Robert
Hooke Building, Department of Physics, University
of Oxford, Parks Road, OxfordOX1
3PP, United Kingdom
| | - Ian Shipsey
- Robert
Hooke Building, Department of Physics, University
of Oxford, Parks Road, OxfordOX1
3PP, United Kingdom
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6
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Brais CJ, Ibañez JO, Schwartz AJ, Ray SJ. RECENT ADVANCES IN INSTRUMENTAL APPROACHES TO TIME-OF-FLIGHT MASS SPECTROMETRY. MASS SPECTROMETRY REVIEWS 2021; 40:647-669. [PMID: 32779281 DOI: 10.1002/mas.21650] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 02/25/2020] [Accepted: 07/07/2020] [Indexed: 06/11/2023]
Abstract
Time-of-flight mass spectrometry (TOFMS) is one of the simplest and most powerful approaches for mass spectrometry. Realization of the advantages inherent in TOFMS requires innovation in the theory and practice of the technique. Instrumental developments, in turn, create new capabilities that enable applications in chemical measurement. This review focuses on the recent advances in TOFMS instrumentation. New strategies for ion acceleration, multiplexed detection, miniaturized TOFMS instruments, approaches to extend the length of ion flight, and novel ion detection technologies are reviewed. Techniques that change the basic paradigm of TOFMS by measuring m/z based on ion flight distance are considered, as are applications at the frontiers of instrumental performance. © 2020 John Wiley & Sons Ltd. Mass Spec Rev.
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Affiliation(s)
- Christopher J Brais
- Department of Chemistry, University at Buffalo, Buffalo, New York, 14260, USA
| | | | | | - Steven J Ray
- Department of Chemistry, University at Buffalo, Buffalo, New York, 14260, USA
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7
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Aoki J, Toyoda M. Development of novel projection-type imaging mass spectrometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:053706. [PMID: 34243350 DOI: 10.1063/5.0037370] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 05/04/2021] [Indexed: 06/13/2023]
Abstract
We developed a novel imaging mass spectrometer based on our accumulating technology for projection-type imaging mass spectrometry, the simulation of an accurate ion trajectory, and the theory for ion optics. The newly developed apparatus yields high spatial resolution with a substantially shorter image-acquisition time compared with conventional scanning-type imaging mass spectrometers. In order to maintain a high mass resolution, a multi-turn time-of-flight mass spectrometer is combined with post-extraction differential acceleration methods. Consequently, a mass resolution of m/Δm ∼ 10 000 and a spatial resolution of 1 μm were achieved simultaneously in this study. Application of our newly established apparatus to biological samples accomplished successful imaging mass spectrometry by exhibiting an organ-specific distribution of endogenous ions as well as a localized distribution of exogenously applied ions with an ultra-high spatial resolution image in the size of 18.5 megapixels.
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Affiliation(s)
- J Aoki
- Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Toyoda
- Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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8
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Klein DR, Blevins MS, Macias LA, Douglass MV, Trent MS, Brodbelt JS. Localization of Double Bonds in Bacterial Glycerophospholipids Using 193 nm Ultraviolet Photodissociation in the Negative Mode. Anal Chem 2020; 92:5986-5993. [PMID: 32212719 PMCID: PMC7385702 DOI: 10.1021/acs.analchem.0c00221] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The need for detailed structural characterization of glycerophospholipids (GPLs) for many types of biologically motivated applications has led to the development of novel mass spectrometry-based methodologies that utilize alternative ion activation methods. Ultraviolet photodissociation (UVPD) has shown great utility for localizing sites of unsaturation within acyl chains and to date has predominantly been used for positive mode analysis of GPLs. In the present work, UVPD is used to localize sites of unsaturation in GPL anions. Similar to UVPD mass spectra of GPL cations, UVPD of deprotonated or formate-adducted GPLs yields diagnostic fragment ions spaced 24 Da apart. This method was integrated into a liquid chromatography workflow and used to evaluate profiles of sites of unsaturation of lipids in Escherichia coli (E. coli) and Acinetobacter baumannii (A. baumannii). When assigning sites of unsaturation, E. coli was found to contain all unsaturation elements at the same position relative to the terminal methyl carbon of the acyl chain; the first carbon participating in a site of unsaturation was consistently seven carbons along the acyl chain when counting carbons from the terminal methyl carbon. GPLs from A. baumannii exhibited more variability in locations of unsaturation. For GPLs containing sites of unsaturation in both acyl chains, an MS3 method was devised to assign sites to specific acyl chains.
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Affiliation(s)
- Dustin R Klein
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Molly S Blevins
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Luis A Macias
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Martin V Douglass
- Department of Infectious Diseases, The University of Georgia, College of Veterinary Medicine, Athens, Georgia 30602, United States
| | - M Stephen Trent
- Department of Infectious Diseases, The University of Georgia, College of Veterinary Medicine, Athens, Georgia 30602, United States
- Department of Microbiology, The University of Georgia, College of Arts and Sciences, Athens, Georgia 30602, United States
| | - Jennifer S Brodbelt
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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9
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Burleigh RJ, Guo A, Smith N, Green A, Thompson S, Burt M, Brouard M. Microscope imaging mass spectrometry with a reflectron. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:023306. [PMID: 32113397 DOI: 10.1063/1.5142271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
A time-of-flight microscope imaging mass spectrometer incorporating a reflectron was used to image mass-resolved ions generated from a 270 μm diameter surface. Mass and spatial resolutions of 8100 ± 700 m/Δm and 18 μm ± 6 μm, respectively, were obtained simultaneously by using pulsed extraction differential acceleration ion optical focusing to create a pseudo-source plane for a single-stage gridless reflectron. The obtainable mass resolution was limited only by the response time of the position-sensitive detector and, according to simulations, could potentially reach 30 200 ± 2900 m/Δm. The spatial resolution can be further improved at the expense of the mass resolution to at least 6 μm by increasing the applied extraction field. An event-triggered fast imaging sensor was additionally used to record ion images for each time-of-flight peak resolved during an experimental cycle, demonstrating the high-throughput capability of the instrument.
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Affiliation(s)
- Robert J Burleigh
- The Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Ang Guo
- The Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Natasha Smith
- The Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Andrew Green
- The Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Steve Thompson
- Ionoptika Limited, Unit B6, Millbrook Close, Chandler's Ford, Eastleigh SO53 4BZ, United Kingdom
| | - Michael Burt
- The Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Mark Brouard
- The Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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10
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Yokota S. Isotope Mass Spectrometry in the Solar System Exploration. Mass Spectrom (Tokyo) 2018; 7:S0076. [PMID: 30324079 PMCID: PMC6172603 DOI: 10.5702/massspectrometry.s0076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 08/09/2018] [Indexed: 11/23/2022] Open
Abstract
Isotope analyses using mass spectrometers have been frequently utilized in the laboratories for the earth planetary science and other scientific and industrial fields. In order to conduct in-situ measurements of compositions and isotope ratios around planets and moons, mass spectrometers onboard spacecraft have also been developed. Ion and electron instruments on orbiters have provided much outputs for the space and planetary science since the early days and mass spectrometers on landers and rovers have recently performed isotope analyses on planetary bodies. We review spaceborne mass spectrometers, instrumentations, and observation results. Starting with spaceborne ion instruments to measure three distribution functions as well as mass for the space plasma physics, mass spectrometers have evolved to recent high-mass-resolution instruments for solar system exploration missions.
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Affiliation(s)
- Shoichiro Yokota
- Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka 560-0043, Japan
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11
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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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12
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Dziekonski ET, Johnson JT, Lee KW, McLuckey SA. Fourier-Transform MS and Closed-Path Multireflection Time-of-Flight MS Using an Electrostatic Linear Ion Trap. Anal Chem 2017; 89:10965-10972. [PMID: 28926221 DOI: 10.1021/acs.analchem.7b02797] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric T. Dziekonski
- Department of Chemistry Purdue University West Lafayette, Indiana 47907-2084, United States
| | - Joshua T. Johnson
- Department of Chemistry Purdue University West Lafayette, Indiana 47907-2084, United States
| | - Kenneth W. Lee
- Department of Chemistry Purdue University West Lafayette, Indiana 47907-2084, United States
| | - Scott A. McLuckey
- Department of Chemistry Purdue University West Lafayette, Indiana 47907-2084, United States
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13
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14
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Amari S. Recent Progress in Presolar Grain Studies. Mass Spectrom (Tokyo) 2014; 3:S0042. [PMID: 26819886 DOI: 10.5702/massspectrometry.s0042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 11/07/2014] [Indexed: 11/23/2022] Open
Abstract
Presolar grains are stardust that condensed in stellar outflows or stellar ejecta, and was incorporated in meteorites. They remain mostly intact throughout the journey from stars to the earth, keeping information of their birthplaces. Studies of presolar grains, which started in 1987, have produced a wealth of information about nucleosynthesis in stars, mixing in stellar ejecta, and temporal variations of isotopic and elemental abundances in the Galaxy. Recent instrumental advancements in secondary ion mass spectrometry (SIMS) brought about the identification of presolar silicate grains. Isotopic and mineralogical investigations of sub-μm grains have been performed using a combination of SIMS, transmission electron microscopy (TEM) and focused ion beam (FIB) techniques. Two instruments have been developed to study even smaller grains (∼50 nm) and measure isotopes and elements of lower abundances than those in previous studies.
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Affiliation(s)
- Sachiko Amari
- McDonnell Center for the Space Sciences and the Physics Department, Washington University
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15
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Ireland TR. Invited review article: Recent developments in isotope-ratio mass spectrometry for geochemistry and cosmochemistry. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:011101. [PMID: 23387630 DOI: 10.1063/1.4765055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Mass spectrometry is fundamental to measurements of isotope ratios for applications in isotope geochemistry, geochronology, and cosmochemistry. Magnetic-sector mass spectrometers are most common because these provide the best precision in isotope ratio measurements. Where the highest precision is desired, chemical separation followed by mass spectrometric analysis is carried out with gas (noble gas and stable isotope mass spectrometry), liquid (inductively coupled plasma mass spectrometry), or solid (thermal ionization mass spectrometry) samples. Developments in in situ analysis, including ion microprobes and laser ablation inductively coupled plasma mass spectrometry, have opened up issues concerning homogeneity according to domain size, and allow ever smaller amounts of material to be analyzed. While mass spectrometry is built solidly on developments in the 20th century, there are new technologies that will push the limits in terms of precision, accuracy, and sample efficiency. Developments of new instruments based on time-of-flight mass spectrometers could open up the ultimate levels of sensitivity per sample atom.
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Affiliation(s)
- Trevor R Ireland
- Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia.
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16
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Satoh T, Kubo A, Shimma S, Toyoda M. Mass Spectrometry Imaging and Structural Analysis of Lipids Directly on Tissue Specimens by Using a Spiral Orbit Type Tandem Time-of-Flight Mass Spectrometer, SpiralTOF-TOF. Mass Spectrom (Tokyo) 2012; 1:A0013. [PMID: 24349914 DOI: 10.5702/massspectrometry.a0013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 10/23/2012] [Indexed: 01/12/2023] Open
Abstract
In this paper, we report the use of mass spectrometry imaging and structural analysis of lipids directly on a tissue specimen, carried out by means of matrix-assisted laser desorption/ionization tandem time-of-flight mass spectrometry, using a combination of spiral orbit-type and reflectron-type time-of-flight mass spectrometers. The most intense peak observed in the mass spectrum from a brain tissue specimen was confirmed as phosphatidylcholine (34 : 1) [M+K](+), using tandem mass spectrometry. The charge remote fragmentation channels, which are characteristically observed using high-energy collision-induced dissociation, contributed significantly to this confirmation. Accurate mass analysis was further facilitated by mass correction using the confirmed peak. In mass spectrometry imaging, the high resolving power of our system could separate doublet peak of less than 0.1 u difference, which would otherwise be problematic when using a low-resolution reflectron type time-of-flight mass spectrometer. Two compounds, observed at m/z 848.56 and 848.65, were found to be located in complementary positions on a brain tissue specimen. These results demonstrate the importance of a high-performance tandem time-of-flight mass spectrometer for mass spectrometry imaging and analysis of observed compounds, to allow distinction between biological molecules.
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Affiliation(s)
| | | | - Shuichi Shimma
- Division of Integrative Omics and Bioinformatics, National Cancer Center Research Institute
| | - Michisato Toyoda
- Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University
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17
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Affiliation(s)
- Feng Xian
- Department
of Chemistry and
Biochemistry, Florida State University,
95 Chieftain Way, Tallahassee, Florida 32310-4390, United States
| | - Christopher L. Hendrickson
- Department
of Chemistry and
Biochemistry, Florida State University,
95 Chieftain Way, Tallahassee, Florida 32310-4390, United States
- Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, 1800
East Paul Dirac Drive, Tallahassee, Florida 32310-4005, United States
| | - Alan G. Marshall
- Department
of Chemistry and
Biochemistry, Florida State University,
95 Chieftain Way, Tallahassee, Florida 32310-4390, United States
- Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, 1800
East Paul Dirac Drive, Tallahassee, Florida 32310-4005, United States
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Hazama H, Yoshimura H, Aoki J, Nagao H, Toyoda M, Masuda K, Fujii K, Tashima T, Naito Y, Awazu K. Development of a stigmatic mass microscope using laser desorption∕ionization and a multi-turn time-of-flight mass spectrometer. JOURNAL OF BIOMEDICAL OPTICS 2011; 16:046007. [PMID: 21529076 DOI: 10.1117/1.3561091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A novel stigmatic mass microscope using laser desorption∕ionization and a multi-turn time-of-flight mass spectrometer, MULTUM-IMG, has been developed. Stigmatic ion images of crystal violet masked by a fine square mesh grid with a 12.7 μm pitch as well as microdot patterns with a 5 μm dot diameter and a 10 μm pitch made with rhodamine B were clearly observed. The estimated spatial resolution was about 3 μm in the linear mode with a 20-fold ion optical magnification. Separating stigmatic ion images according to the time-of-flight, i.e., the mass-to-charge ratio of the ions was successfully demonstrated by a microdot pattern made with two different dyes, crystal violet and methylene blue. Stigmatic ion images of a microdot pattern made with crystal violet were observed after circulation in MULTUM-IMG, and the pattern of the ion image was maintained after ten cycles in MULTUM-IMG. A section of a mouse brain stained with crystal violet and methylene blue was observed in the linear mode, and the stigmatic total ion image of crystal violet and methylene blue agreed well with the optical microphotograph of the hippocampus for the same section.
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Affiliation(s)
- Hisanao Hazama
- Osaka University, Graduate School of Engineering, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
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AOKI J, HAZAMA H, TOYODA M. Novel Ion Extraction Method for Imaging Mass Spectrometry. ACTA ACUST UNITED AC 2011. [DOI: 10.5702/massspec.11-20] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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