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Papanastasiou D, Kounadis D, Lekkas A, Orfanopoulos I, Mpozatzidis A, Smyrnakis A, Panagiotopoulos E, Kosmopoulou M, Reinhardt-Szyba M, Fort K, Makarov A, Zubarev RA. The Omnitrap Platform: A Versatile Segmented Linear Ion Trap for Multidimensional Multiple-Stage Tandem Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:1990-2007. [PMID: 36113052 PMCID: PMC9850925 DOI: 10.1021/jasms.2c00214] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/08/2022] [Accepted: 09/12/2022] [Indexed: 06/15/2023]
Abstract
Multidimensional multiple-stage tandem processing of ions is demonstrated successfully in a novel segmented linear ion trap. The enhanced performance is enabled by incorporating the entire range of ion activation methods into a single platform in a highly dynamic fashion. The ion activation network comprises external injection of reagent ions, radical neutral species, photons, electrons, and collisions with neutrals. Axial segmentation of the two-dimensional trapping field provides access to a unique functionality landscape through a system of purpose-designed regions for processing ions with maximum flexibility. Design aspects of the segmented linear ion trap, termed the Omnitrap platform, are highlighted, and motion of ions trapped by rectangular waveforms is investigated experimentally by mapping the stability diagram, tracing secular frequencies, and exploring different isolation techniques. All fragmentation methods incorporated in the Omnitrap platform involving radical chemistry are shown to provide complete sequence coverage for partially unfolded ubiquitin. Three-stage (MS3) tandem mass spectrometry experiments combining collision-induced dissociation of radical ions produced by electron meta-ionization and further involving two intermediate steps of ion isolation and accumulation are performed with high efficiency, producing information rich spectra with signal-to-noise levels comparable to those obtained in a two-stage (MS2) experiment. The advanced capabilities of the Omnitrap platform to provide in-depth top-down MSn characterization of proteins are portrayed. Performance is further enhanced by connecting the Omnitrap platform to an Orbitrap mass analyzer, while successful integration with time-of-flight analyzers has already been demonstrated.
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Affiliation(s)
- Dimitris Papanastasiou
- Fasmatech
Science & Technology, TESPA Lefkippos, NCSR Demokritos, Agia Paraskevi, 15341 Athens, Greece
| | - Diamantis Kounadis
- Fasmatech
Science & Technology, TESPA Lefkippos, NCSR Demokritos, Agia Paraskevi, 15341 Athens, Greece
| | - Alexandros Lekkas
- Fasmatech
Science & Technology, TESPA Lefkippos, NCSR Demokritos, Agia Paraskevi, 15341 Athens, Greece
| | - Ioannis Orfanopoulos
- Fasmatech
Science & Technology, TESPA Lefkippos, NCSR Demokritos, Agia Paraskevi, 15341 Athens, Greece
| | - Andreas Mpozatzidis
- Fasmatech
Science & Technology, TESPA Lefkippos, NCSR Demokritos, Agia Paraskevi, 15341 Athens, Greece
| | - Athanasios Smyrnakis
- Fasmatech
Science & Technology, TESPA Lefkippos, NCSR Demokritos, Agia Paraskevi, 15341 Athens, Greece
| | - Elias Panagiotopoulos
- Fasmatech
Science & Technology, TESPA Lefkippos, NCSR Demokritos, Agia Paraskevi, 15341 Athens, Greece
| | - Mariangela Kosmopoulou
- Fasmatech
Science & Technology, TESPA Lefkippos, NCSR Demokritos, Agia Paraskevi, 15341 Athens, Greece
| | | | - Kyle Fort
- Thermo
Fisher Scientific, Hanna-Kunath-Straße
11, 28199 Bremen, Germany
| | - Alexander Makarov
- Thermo
Fisher Scientific, Hanna-Kunath-Straße
11, 28199 Bremen, Germany
| | - Roman A. Zubarev
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Solnavägen 9, 17165 Solna, Sweden
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On-the-fly investigation of XUV excited large molecular ions using a high harmonic generation light source. Sci Rep 2022; 12:13191. [PMID: 35915132 PMCID: PMC9343369 DOI: 10.1038/s41598-022-17416-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 07/25/2022] [Indexed: 11/25/2022] Open
Abstract
We present experiments where extreme ultraviolet femtosecond light pulses are used to photoexcite large molecular ions at high internal energy. This is done by combining an electrospray ionization source and a mass spectrometer with a pulsed light source based on high harmonic generation. This allows one to study the interaction between high energy photons and mass selected ions in conditions that are accessible on large-scale facilities. We show that even without an ion trapping device, systems as large as a protein can be studied. We observe light induced dissociative ionization and proton migration in model systems such as reserpine, insulin and cytochrome c. These results offer new perspectives to perform time-resolved experiments with ultrashort pulses at the heart of the emerging field of attosecond chemistry.
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Spampinato V, Franquet A, De Simone D, Pollentier I, Pirkl A, Oka H, van der Heide P. SIMS Analysis of Thin EUV Photoresist Films. Anal Chem 2022; 94:2408-2415. [PMID: 35076209 DOI: 10.1021/acs.analchem.1c04012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This study reports on the application of secondary ion mass spectrometry (SIMS) for examining thin (20-50 nm) chemically amplified resist films on silicon. SIMS depth profiling was carried out using a gas cluster ion beam to ensure minimal sputter-induced damage to the organic constituents of interest. Specific attention concerned the distribution of the photo acid generator (PAG) molecule within these films, along with the photo-induced fragmentation occurring on extreme ultra-violet photo exposure. Positive secondary ion spectra were collected using a traditional time of flight (ToF)-SIMS and the latest generation IONTOF Hybrid SIMS instrumentation equipped with an OrbitrapTM mass analyzer. Tandem mass spectrometry (MS/MS) capability within the OrbitrapTM secondary ion column was utilized to verify that the C19H17S+ secondary ion did indeed have the molecular structure consistent with the PAG structure. The superior mass resolving power of the OrbitrapTM mass analyzer (∼20× of the ToF mass analyzer) along with improved mass accuracy (a few ppm) proved pivotal in the mass spectral and depth profile analysis of these films. This was not the case for the ToF-SIMS experiments, as the mass spectra, as well as the associated depth profiles, exhibited severe molecular (isobaric) interferences.
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Affiliation(s)
| | | | | | | | | | - Hironori Oka
- Electronic Materials Research Laboratories, FUJIFILM Corporation, 421-0396 Shizuoka, Japan
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Brodbelt JS, Morrison LJ, Santos I. Ultraviolet Photodissociation Mass Spectrometry for Analysis of Biological Molecules. Chem Rev 2020; 120:3328-3380. [PMID: 31851501 PMCID: PMC7145764 DOI: 10.1021/acs.chemrev.9b00440] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The development of new ion-activation/dissociation methods continues to be one of the most active areas of mass spectrometry owing to the broad applications of tandem mass spectrometry in the identification and structural characterization of molecules. This Review will showcase the impact of ultraviolet photodissociation (UVPD) as a frontier strategy for generating informative fragmentation patterns of ions, especially for biological molecules whose complicated structures, subtle modifications, and large sizes often impede molecular characterization. UVPD energizes ions via absorption of high-energy photons, which allows access to new dissociation pathways relative to more conventional ion-activation methods. Applications of UVPD for the analysis of peptides, proteins, lipids, and other classes of biologically relevant molecules are emphasized in this Review.
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Affiliation(s)
- Jennifer S. Brodbelt
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Lindsay J. Morrison
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Inês Santos
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
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