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Publisher: Elsevier   (Total: 3183 journals)

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Showing 1 - 200 of 3183 Journals sorted alphabetically
Academic Pediatrics     Hybrid Journal   (Followers: 38, SJR: 1.655, CiteScore: 2)
Academic Radiology     Hybrid Journal   (Followers: 26, SJR: 1.015, CiteScore: 2)
Accident Analysis & Prevention     Partially Free   (Followers: 102, SJR: 1.462, CiteScore: 3)
Accounting Forum     Hybrid Journal   (Followers: 28, SJR: 0.932, CiteScore: 2)
Accounting, Organizations and Society     Hybrid Journal   (Followers: 40, SJR: 1.771, CiteScore: 3)
Achievements in the Life Sciences     Open Access   (Followers: 7)
Acta Anaesthesiologica Taiwanica     Open Access   (Followers: 6)
Acta Astronautica     Hybrid Journal   (Followers: 436, SJR: 0.758, CiteScore: 2)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 2)
Acta Biomaterialia     Hybrid Journal   (Followers: 28, SJR: 1.967, CiteScore: 7)
Acta Colombiana de Cuidado Intensivo     Full-text available via subscription   (Followers: 3)
Acta de Investigación Psicológica     Open Access   (Followers: 3)
Acta Ecologica Sinica     Open Access   (Followers: 11, SJR: 0.18, CiteScore: 1)
Acta Histochemica     Hybrid Journal   (Followers: 5, SJR: 0.661, CiteScore: 2)
Acta Materialia     Hybrid Journal   (Followers: 312, SJR: 3.263, CiteScore: 6)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5, SJR: 0.504, CiteScore: 1)
Acta Mechanica Solida Sinica     Full-text available via subscription   (Followers: 9, SJR: 0.542, CiteScore: 1)
Acta Oecologica     Hybrid Journal   (Followers: 12, SJR: 0.834, CiteScore: 2)
Acta Otorrinolaringologica (English Edition)     Full-text available via subscription  
Acta Otorrinolaringológica Española     Full-text available via subscription   (Followers: 2, SJR: 0.307, CiteScore: 0)
Acta Pharmaceutica Sinica B     Open Access   (Followers: 1, SJR: 1.793, CiteScore: 6)
Acta Poética     Open Access   (Followers: 4, SJR: 0.101, CiteScore: 0)
Acta Psychologica     Hybrid Journal   (Followers: 26, SJR: 1.331, CiteScore: 2)
Acta Sociológica     Open Access   (Followers: 1)
Acta Tropica     Hybrid Journal   (Followers: 6, SJR: 1.052, CiteScore: 2)
Acta Urológica Portuguesa     Open Access  
Actas Dermo-Sifiliograficas     Full-text available via subscription   (Followers: 3, SJR: 0.374, CiteScore: 1)
Actas Dermo-Sifiliográficas (English Edition)     Full-text available via subscription   (Followers: 2)
Actas Urológicas Españolas     Full-text available via subscription   (Followers: 3, SJR: 0.344, CiteScore: 1)
Actas Urológicas Españolas (English Edition)     Full-text available via subscription   (Followers: 1)
Actualites Pharmaceutiques     Full-text available via subscription   (Followers: 7, SJR: 0.19, CiteScore: 0)
Actualites Pharmaceutiques Hospitalieres     Full-text available via subscription   (Followers: 3)
Acupuncture and Related Therapies     Hybrid Journal   (Followers: 8)
Acute Pain     Full-text available via subscription   (Followers: 15, SJR: 2.671, CiteScore: 5)
Ad Hoc Networks     Hybrid Journal   (Followers: 11, SJR: 0.53, CiteScore: 4)
Addictive Behaviors     Hybrid Journal   (Followers: 18, SJR: 1.29, CiteScore: 3)
Addictive Behaviors Reports     Open Access   (Followers: 9, SJR: 0.755, CiteScore: 2)
Additive Manufacturing     Hybrid Journal   (Followers: 11, SJR: 2.611, CiteScore: 8)
Additives for Polymers     Full-text available via subscription   (Followers: 23)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 183, SJR: 4.09, CiteScore: 13)
Advanced Engineering Informatics     Hybrid Journal   (Followers: 12, SJR: 1.167, CiteScore: 4)
Advanced Powder Technology     Hybrid Journal   (Followers: 17, SJR: 0.694, CiteScore: 3)
Advances in Accounting     Hybrid Journal   (Followers: 9, SJR: 0.277, CiteScore: 1)
Advances in Agronomy     Full-text available via subscription   (Followers: 17, SJR: 2.384, CiteScore: 5)
Advances in Anesthesia     Full-text available via subscription   (Followers: 29, SJR: 0.126, CiteScore: 0)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 2)
Advances in Applied Mathematics     Full-text available via subscription   (Followers: 12, SJR: 0.992, CiteScore: 1)
Advances in Applied Mechanics     Full-text available via subscription   (Followers: 12, SJR: 1.551, CiteScore: 4)
Advances in Applied Microbiology     Full-text available via subscription   (Followers: 24, SJR: 2.089, CiteScore: 5)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 15, SJR: 0.572, CiteScore: 2)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4, SJR: 2.61, CiteScore: 7)
Advances in Botanical Research     Full-text available via subscription   (Followers: 2, SJR: 0.686, CiteScore: 2)
Advances in Cancer Research     Full-text available via subscription   (Followers: 34, SJR: 3.043, CiteScore: 6)
Advances in Carbohydrate Chemistry and Biochemistry     Full-text available via subscription   (Followers: 9, SJR: 1.453, CiteScore: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5, SJR: 1.992, CiteScore: 5)
Advances in Cell Aging and Gerontology     Full-text available via subscription   (Followers: 5)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 14)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 29, SJR: 0.156, CiteScore: 1)
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 11, SJR: 0.713, CiteScore: 1)
Advances in Chronic Kidney Disease     Full-text available via subscription   (Followers: 10, SJR: 1.316, CiteScore: 2)
Advances in Clinical Chemistry     Full-text available via subscription   (Followers: 26, SJR: 1.562, CiteScore: 3)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 20, SJR: 1.977, CiteScore: 8)
Advances in Computers     Full-text available via subscription   (Followers: 14, SJR: 0.205, CiteScore: 1)
Advances in Dermatology     Full-text available via subscription   (Followers: 15)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 13)
Advances in Digestive Medicine     Open Access   (Followers: 12)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 7)
Advances in Drug Research     Full-text available via subscription   (Followers: 26)
Advances in Ecological Research     Full-text available via subscription   (Followers: 43, SJR: 2.524, CiteScore: 4)
Advances in Engineering Software     Hybrid Journal   (Followers: 29, SJR: 1.159, CiteScore: 4)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 8)
Advances in Experimental Social Psychology     Full-text available via subscription   (Followers: 51, SJR: 5.39, CiteScore: 8)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 1)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 9)
Advances in Food and Nutrition Research     Full-text available via subscription   (Followers: 65, SJR: 0.591, CiteScore: 2)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 17)
Advances in Genetics     Full-text available via subscription   (Followers: 21, SJR: 1.354, CiteScore: 4)
Advances in Genome Biology     Full-text available via subscription   (Followers: 10, SJR: 12.74, CiteScore: 13)
Advances in Geophysics     Full-text available via subscription   (Followers: 7, SJR: 1.193, CiteScore: 3)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 26, SJR: 0.368, CiteScore: 1)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 11, SJR: 0.749, CiteScore: 3)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 25)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 3, SJR: 0.193, CiteScore: 0)
Advances in Immunology     Full-text available via subscription   (Followers: 37, SJR: 4.433, CiteScore: 6)
Advances in Inorganic Chemistry     Full-text available via subscription   (Followers: 10, SJR: 1.163, CiteScore: 2)
Advances in Insect Physiology     Full-text available via subscription   (Followers: 2, SJR: 1.938, CiteScore: 3)
Advances in Integrative Medicine     Hybrid Journal   (Followers: 6, SJR: 0.176, CiteScore: 0)
Advances in Intl. Accounting     Full-text available via subscription   (Followers: 3)
Advances in Life Course Research     Hybrid Journal   (Followers: 9, SJR: 0.682, CiteScore: 2)
Advances in Lipobiology     Full-text available via subscription   (Followers: 1)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Marine Biology     Full-text available via subscription   (Followers: 21, SJR: 0.88, CiteScore: 2)
Advances in Mathematics     Full-text available via subscription   (Followers: 14, SJR: 3.027, CiteScore: 2)
Advances in Medical Sciences     Hybrid Journal   (Followers: 8, SJR: 0.694, CiteScore: 2)
Advances in Medicinal Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Microbial Physiology     Full-text available via subscription   (Followers: 5, SJR: 1.158, CiteScore: 3)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 24)
Advances in Molecular and Cellular Endocrinology     Full-text available via subscription   (Followers: 8)
Advances in Molecular Toxicology     Full-text available via subscription   (Followers: 7, SJR: 0.182, CiteScore: 0)
Advances in Nanoporous Materials     Full-text available via subscription   (Followers: 5)
Advances in Oncobiology     Full-text available via subscription   (Followers: 2)
Advances in Organ Biology     Full-text available via subscription   (Followers: 2)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 18, SJR: 1.875, CiteScore: 4)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 7, SJR: 0.174, CiteScore: 0)
Advances in Parasitology     Full-text available via subscription   (Followers: 5, SJR: 1.579, CiteScore: 4)
Advances in Pediatrics     Full-text available via subscription   (Followers: 27, SJR: 0.461, CiteScore: 1)
Advances in Pharmaceutical Sciences     Full-text available via subscription   (Followers: 19)
Advances in Pharmacology     Full-text available via subscription   (Followers: 17, SJR: 1.536, CiteScore: 3)
Advances in Physical Organic Chemistry     Full-text available via subscription   (Followers: 9, SJR: 0.574, CiteScore: 1)
Advances in Phytomedicine     Full-text available via subscription  
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3, SJR: 0.109, CiteScore: 1)
Advances in Plant Biochemistry and Molecular Biology     Full-text available via subscription   (Followers: 10)
Advances in Plant Pathology     Full-text available via subscription   (Followers: 6)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 19)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 20, SJR: 0.791, CiteScore: 2)
Advances in Psychology     Full-text available via subscription   (Followers: 67)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6, SJR: 0.371, CiteScore: 1)
Advances in Radiation Oncology     Open Access   (Followers: 1, SJR: 0.263, CiteScore: 1)
Advances in Small Animal Medicine and Surgery     Hybrid Journal   (Followers: 3, SJR: 0.101, CiteScore: 0)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 6)
Advances in Space Research     Full-text available via subscription   (Followers: 421, SJR: 0.569, CiteScore: 2)
Advances in Structural Biology     Full-text available via subscription   (Followers: 5)
Advances in Surgery     Full-text available via subscription   (Followers: 13, SJR: 0.555, CiteScore: 2)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 37, SJR: 2.208, CiteScore: 4)
Advances in Veterinary Medicine     Full-text available via subscription   (Followers: 20)
Advances in Veterinary Science and Comparative Medicine     Full-text available via subscription   (Followers: 15)
Advances in Virus Research     Full-text available via subscription   (Followers: 6, SJR: 2.262, CiteScore: 5)
Advances in Water Resources     Hybrid Journal   (Followers: 53, SJR: 1.551, CiteScore: 3)
Aeolian Research     Hybrid Journal   (Followers: 6, SJR: 1.117, CiteScore: 3)
Aerospace Science and Technology     Hybrid Journal   (Followers: 384, SJR: 0.796, CiteScore: 3)
AEU - Intl. J. of Electronics and Communications     Hybrid Journal   (Followers: 8, SJR: 0.42, CiteScore: 2)
African J. of Emergency Medicine     Open Access   (Followers: 6, SJR: 0.296, CiteScore: 0)
Ageing Research Reviews     Hybrid Journal   (Followers: 12, SJR: 3.671, CiteScore: 9)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 475, SJR: 1.238, CiteScore: 3)
Agri Gene     Hybrid Journal   (Followers: 1, SJR: 0.13, CiteScore: 0)
Agricultural and Forest Meteorology     Hybrid Journal   (Followers: 18, SJR: 1.818, CiteScore: 5)
Agricultural Systems     Hybrid Journal   (Followers: 31, SJR: 1.156, CiteScore: 4)
Agricultural Water Management     Hybrid Journal   (Followers: 44, SJR: 1.272, CiteScore: 3)
Agriculture and Agricultural Science Procedia     Open Access   (Followers: 4)
Agriculture and Natural Resources     Open Access   (Followers: 3)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 58, SJR: 1.747, CiteScore: 4)
Ain Shams Engineering J.     Open Access   (Followers: 5, SJR: 0.589, CiteScore: 3)
Air Medical J.     Hybrid Journal   (Followers: 8, SJR: 0.26, CiteScore: 0)
AKCE Intl. J. of Graphs and Combinatorics     Open Access   (SJR: 0.19, CiteScore: 0)
Alcohol     Hybrid Journal   (Followers: 12, SJR: 1.153, CiteScore: 3)
Alcoholism and Drug Addiction     Open Access   (Followers: 12)
Alergologia Polska : Polish J. of Allergology     Full-text available via subscription   (Followers: 1)
Alexandria Engineering J.     Open Access   (Followers: 2, SJR: 0.604, CiteScore: 3)
Alexandria J. of Medicine     Open Access   (Followers: 1, SJR: 0.191, CiteScore: 1)
Algal Research     Partially Free   (Followers: 11, SJR: 1.142, CiteScore: 4)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
Allergologia et Immunopathologia     Full-text available via subscription   (Followers: 1, SJR: 0.504, CiteScore: 1)
Allergology Intl.     Open Access   (Followers: 5, SJR: 1.148, CiteScore: 2)
Alpha Omegan     Full-text available via subscription   (SJR: 3.521, CiteScore: 6)
ALTER - European J. of Disability Research / Revue Européenne de Recherche sur le Handicap     Full-text available via subscription   (Followers: 10, SJR: 0.201, CiteScore: 1)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 53, SJR: 4.66, CiteScore: 10)
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring     Open Access   (Followers: 6, SJR: 1.796, CiteScore: 4)
Alzheimer's & Dementia: Translational Research & Clinical Interventions     Open Access   (Followers: 6, SJR: 1.108, CiteScore: 3)
Ambulatory Pediatrics     Hybrid Journal   (Followers: 5)
American Heart J.     Hybrid Journal   (Followers: 58, SJR: 3.267, CiteScore: 4)
American J. of Cardiology     Hybrid Journal   (Followers: 63, SJR: 1.93, CiteScore: 3)
American J. of Emergency Medicine     Hybrid Journal   (Followers: 46, SJR: 0.604, CiteScore: 1)
American J. of Geriatric Pharmacotherapy     Full-text available via subscription   (Followers: 12)
American J. of Geriatric Psychiatry     Hybrid Journal   (Followers: 14, SJR: 1.524, CiteScore: 3)
American J. of Human Genetics     Hybrid Journal   (Followers: 37, SJR: 7.45, CiteScore: 8)
American J. of Infection Control     Hybrid Journal   (Followers: 29, SJR: 1.062, CiteScore: 2)
American J. of Kidney Diseases     Hybrid Journal   (Followers: 36, SJR: 2.973, CiteScore: 4)
American J. of Medicine     Hybrid Journal   (Followers: 50)
American J. of Medicine Supplements     Full-text available via subscription   (Followers: 3, SJR: 1.967, CiteScore: 2)
American J. of Obstetrics and Gynecology     Hybrid Journal   (Followers: 255, SJR: 2.7, CiteScore: 4)
American J. of Ophthalmology     Hybrid Journal   (Followers: 66, SJR: 3.184, CiteScore: 4)
American J. of Ophthalmology Case Reports     Open Access   (Followers: 5, SJR: 0.265, CiteScore: 0)
American J. of Orthodontics and Dentofacial Orthopedics     Full-text available via subscription   (Followers: 6, SJR: 1.289, CiteScore: 1)
American J. of Otolaryngology     Hybrid Journal   (Followers: 25, SJR: 0.59, CiteScore: 1)
American J. of Pathology     Hybrid Journal   (Followers: 32, SJR: 2.139, CiteScore: 4)
American J. of Preventive Medicine     Hybrid Journal   (Followers: 28, SJR: 2.164, CiteScore: 4)
American J. of Surgery     Hybrid Journal   (Followers: 39, SJR: 1.141, CiteScore: 2)
American J. of the Medical Sciences     Hybrid Journal   (Followers: 12, SJR: 0.767, CiteScore: 1)
Ampersand : An Intl. J. of General and Applied Linguistics     Open Access   (Followers: 7)
Anaerobe     Hybrid Journal   (Followers: 4, SJR: 1.144, CiteScore: 3)
Anaesthesia & Intensive Care Medicine     Full-text available via subscription   (Followers: 66, SJR: 0.138, CiteScore: 0)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 24, SJR: 0.411, CiteScore: 1)
Anales de Cirugia Vascular     Full-text available via subscription   (Followers: 1)
Anales de Pediatría     Full-text available via subscription   (Followers: 3, SJR: 0.277, CiteScore: 0)
Anales de Pediatría (English Edition)     Full-text available via subscription  
Anales de Pediatría Continuada     Full-text available via subscription  
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 5, SJR: 4.849, CiteScore: 10)
Analytica Chimica Acta     Hybrid Journal   (Followers: 44, SJR: 1.512, CiteScore: 5)
Analytica Chimica Acta : X     Open Access  
Analytical Biochemistry     Hybrid Journal   (Followers: 209, SJR: 0.633, CiteScore: 2)
Analytical Chemistry Research     Open Access   (Followers: 13, SJR: 0.411, CiteScore: 2)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 14)
Anesthésie & Réanimation     Full-text available via subscription   (Followers: 2)
Anesthesiology Clinics     Full-text available via subscription   (Followers: 25, SJR: 0.683, CiteScore: 2)
Angiología     Full-text available via subscription   (SJR: 0.121, CiteScore: 0)
Angiologia e Cirurgia Vascular     Open Access   (Followers: 1, SJR: 0.111, CiteScore: 0)
Animal Behaviour     Hybrid Journal   (Followers: 223, SJR: 1.58, CiteScore: 3)
Animal Feed Science and Technology     Hybrid Journal   (Followers: 6, SJR: 0.937, CiteScore: 2)
Animal Reproduction Science     Hybrid Journal   (Followers: 7, SJR: 0.704, CiteScore: 2)

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Similar Journals
Journal Cover
International Journal of Mass Spectrometry
Journal Prestige (SJR): 0.61
Citation Impact (citeScore): 2
Number of Followers: 16  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1387-3806
Published by Elsevier Homepage  [3183 journals]
  • Gas-phase structures and thermochemical properties of protonated 5-HMF
           isomers
    • Abstract: Publication date: Available online 12 October 2019Source: International Journal of Mass SpectrometryAuthor(s): S. Garzoli, L. Antonini, A. Troiani, C. Salvitti, P. Giacomello, A. Patsilinakos, R. Ragno, F. Pepi The gas-phase ion chemistry of protonated 5-hydroxymethyl-2-furaldehyde (5-HMF), the main product of hexose sugar dehydration reaction, was investigated by means of mass spectrometric and theoretical calculations.Calculations at the B3LYP-D3/6-311++G** and the G3 (MP2, CCSD(T)) levels of theory indicated the carbonyl oxygen as the 5-HMF preferred protonation site. The Cooks’ “extended” kinetic method was used to measure the unknown proton affinity (PA) and gas-phase basicity (GB) of 5-HMF. The experimentally measured values, PA= 207.3 kcal mol−1 and GB = 200.0 kcal mol−1, were found to be in good agreement with those calculated by means of G3 (MP2, CCSD(T)) composite methods. Among the seven different 5-HMF optimized protomers, the theoretically predicted potential energy surface of [5-HMF]H+ ions indicated that the carbonyl oxygen protonated most stable species, as well as each one of the four ring-protonated less stable isomers, were trapped in deep potential wells and, at least in principle, could be formed from the gas phase acid-catalyzed hexose sugar decomposition.Graphical abstractImage 1
       
  • Observation of varied characteristics of chlorine isotope effects of
           organochlorines in dechlorination reactions on different types of electron
           ionization mass spectrometers
    • Abstract: Publication date: Available online 9 October 2019Source: International Journal of Mass SpectrometryAuthor(s): Caiming Tang, Liang Peng, Jianhua Tan, Yufeng Guan, Qiuxin Huang, Zhiqiang Yu, Xianzhi Peng Dechlorination reactions of organochlorines can commonly take place in fragmentation on electron ionization mass spectrometry (EI-MS) and collision-induced dissociation (CID) on electron ionization tandem mass spectrometry (EI-MS/MS), possibly accompanied with chlorine isotope effects. However, it remains unclear whether characteristics of chlorine isotope effects of individual organochlorines occurring on different types of mass spectrometers are similar or different. Revelation of characteristics of chlorine isotope effects on different mass spectrometers may help to elucidate mechanisms of dechlorination reactions and fragmental pathways of organochlorines. This study investigated the characteristics of chlorine isotope effects of two model organochlorines, i.e., tetrachloroethylene and trichloroethylene, during fragmentation/CID on EI-double focusing magnetic-sector high resolution MS (EI-HRMS), EI-quadrupole MS (EI-qMS) and EI-triple-quadrupole MS/MS (EI-MS/MS) that were all coupled with gas chromatography (GC). The patterns of chlorine isotope ratios measured by different instruments were different, showing different characteristics of chlorine isotope effects. On EI-HRMS, both normal and inverse chlorine isotope effects were observed; while on EI-qMS, only normal isotope effects were found, and on EI-MS/MS merely inverse isotope effects were discovered. On EI-HRMS and EI-qMS, inter-ion and intra-ion chlorine kinetic isotope effects (Cl-KIEs) might participate in isotope fractionation processes and contribute to inverse inter-ion and normal intra-ion isotope effects, respectively, and the dominant isotope effects determined the direction of observed (apparent) isotope effects. On EI-MS/MS, both inter-ion and intra-ion Cl-KIEs were inverse at high collision energies (including 30 and 45 eV) and contributed to normal inter-ion and inverse intra-ion isotope effects, respectively, and the inverse intra-ion isotope effects were the dominant, leading to the inverse apparent isotope effects in all dechlorination reactions. Particularly, the chlorine isotope ratios measured by EI-qMS exponentially decreased with the increasing Cl atoms of ions, implying that the intra-ion isotope effects rose as broken C–Cl bonds increased. Moreover, fundamentals of chlorine isotope effects in the stepwise multibond dechlorination reactions were revealed with the aid of density functional theory calculations. The different measurement timescales and geometries of the mass spectrometers and the difference in EI-induced fragmentation and CID might result in the different characteristics of chlorine isotope effects. This study may be conducive to elucidating isotope fractionation behaviors and fragmental pathways of organochlorines on EI-MS(/MS), and provides new insights into the mechanisms of dechlorination reactions losing multiple chlorine atoms.Graphical abstractImage 1
       
  • Multiply charged energetic metal ion emissions from dinuclear metal
           complex exposed to intense femtosecond laser fields
    • Abstract: Publication date: Available online 7 October 2019Source: International Journal of Mass SpectrometryAuthor(s): Takuya Matsumoto, Hiroki Tanaka, Nobuaki Nakashima, Tomoyuki Yatsuhashi Coulomb explosion of nonmetal ions emerged from a variety of molecules has been studied and utilized for the determination of molecular structure and reaction dynamics. In contrast, Coulomb explosion of metal ions, particularly the large Coulombic interactions are expected, has not yet been explored. In this study, the angular distributions of Mnx+ (x = 1–5), Cy+ (y = 1–4), and Oz+ (z = 1–3) emerged from dimanganese decacarbonyl, in which two metal atoms are sandwiched by axial ligands, exposed to intense femtosecond laser fields (1 × 1014–3 × 1015 W cm−2) are investigated. Manganese ions are produced at relatively low laser intensity compared with other transition metal ions with the same charge number but emerged from mononuclear complexes such as metallocenes and metal hexacarbonyls. The kinetic energies of Mn4+ and Mn5+ are described by the simple Coulomb repulsion model of manganese dimer ion. Fairly high kinetic energy of oxygen and carbon ions compared with those emerged from metal hexacarbonyls strongly suggests that atomic ions originating in ligands are repelled by manganese ions at the moment of Coulomb explosion. The use of dinuclear metal complex is advantageous in the production of multiply charged metal ions accompanying high kinetic energy since two manganese ions are in close confinement due to the repulsions with axial ligand (atomic) ions.Graphical abstractImage 1
       
  • Ion spectroscopy of heterogeneous mixtures: IRMPD and DFT analysis of
           anomers and conformers of monosaccharides
    • Abstract: Publication date: Available online 5 October 2019Source: International Journal of Mass SpectrometryAuthor(s): Loic Barnes, Abdul-Rahman Allouche, Stephane Chambert, Baptiste Schindler, Isabelle Compagnon The gas phase IR spectra of three protonated hexosamines are measured in the 3 μm range using IRMPD spectroscopy and compared with DFT simulation of the IR spectra to identify the ring conformations and the contributions of the α and β anomers to the experimental spectra. We propose an original approach for the deconvolution and quantification of heterogeneous IR spectra based on linear combination of the DFT spectra. The method is applied to the analysis of a two-component anomeric mixture and validated using NMR analysis. Finally, we further estimate the relative populations of a three-component mixture: the anomers and conformers of glucosamine.Graphical abstractImage 1
       
  • Calibration of parent and fragment ion detection rates in Rosettas
           ROSINA/DFMS mass spectrometer
    • Abstract: Publication date: Available online 3 October 2019Source: International Journal of Mass SpectrometryAuthor(s): J. De Keyser, A. Gibbons, F. Dhooghe, K. Altwegg, H. Balsiger, J.-J. Berthelier, S.A. Fuselier, T.I. Gombosi, E. Neefs, M. Rubin The Double Focusing Mass Spectrometer DFMS embarked on the European Space Agency's Rosetta mission as part of the ROSINA instrument suite. It boasts a high mass resolution and a high sensitivity, which have guaranteed spectacular discoveries during Rosetta's rendez-vous with comet 67P/Churyumov-Gerasimenko. This paper describes the DFMS data calibration procedure for determining the parent and fragment ion count rates in the neutral mode, which serve as the basis for retrieving the neutral gas densities. A new approach to computing secondary electron yields is presented. Attention is given to an analysis of the mass peak shapes, which change with magnet temperature. Discrete counting statistical effects also affect the peak shape at low counts. If not accounted for, changes of mass peak shape can induce errors of up to 20% on the determination of the ion fluxes. An assessment of the different sources of uncertainty on the obtained count rates and ratios of count rates is presented.Graphical abstractImage 1
       
  • Position-dependent microchannel plate gain correction in Rosetta's
           ROSINA/DFMS mass spectrometer
    • Abstract: Publication date: Available online 19 September 2019Source: International Journal of Mass SpectrometryAuthor(s): J. De Keyser, K. Altwegg, A. Gibbons, F. Dhooghe, H. Balsiger, J.-J. Berthelier, S.A. Fuselier, T.I. Gombosi, E. Neefs, M. Rubin Mass spectrometers that rely on microchannel plate (MCP) detectors age when they are used intensively. The ageing process is due to a reduction of the MCP gain as ions repeatedly bombard the MCP, leading to a reduction of the secondary electron yield of an impacting ion and to a reduction of the electron amplification within the MCP pores. MCP gain therefore is both time- and position-dependent. This is particularly true for the Double Focusing Mass Spectrometer DFMS, part of the ROSINA instrument, embarked on the European Space Agency's Rosetta spacecraft that studied comet 67P/Churyumov-Gerasimenko continuously for over more than 2 years. A position-dependent gain correction technique is developed here. A detailed assessment of the technique demonstrates that improper treatment of this position-dependent gain can lead to misleading results and false conclusions, especially regarding less abundant species whose mass peak signature overlaps with peaks of abundant species. The correction technique presented here avoids such problems, especially in the situation where detector ageing is significant and uneven across the detector. It is also able to explain why all recorded mass peaks have a nearly symmetric double Gaussian shape, despite the strong variations in the position-dependent gain.Graphical abstractImage 1
       
  • Measurement of the asymmetric UO2 2+ stretching frequency for [UVIO2(F)3]-
           using IRMPD spectroscopy
    • Abstract: Publication date: Available online 17 September 2019Source: International Journal of Mass SpectrometryAuthor(s): Irena Tatosian, Luke Metzler, Connor Graca, Amanda Bubas, Theodore Corcovilos, Jonathan Martens, Giel Berden, Jos Oomens, Michael J. Van Stipdonk In a previous study [Int. J. Mass Spectrom. 2010; 297: 67–75], the asymmetric O=U=O stretch (ν3) was measured for anionic uranyl complexes with composition [UO2(X)3]-, X = Cl-, Br- and I-. Within this group of complexes, the ν3 frequency red-shifts following the trend I > Br > Cl, suggesting concomitant weakening of the U=O bonds. However, a value for [UO2(F)3]- was not measured, which prevented a comprehensive comparison of measured ν3 positions to computed frequencies from density functional theory (DFT) calculations. Because the shift in ν3 is predicted to be most dramatic when X = F, we revisited these species using infrared multiple-photon photodissociation spectroscopy. As in our earlier study, a modest red-shift to the ν3 vibration of ∼ 6 cm-1 was observed for X = I-, Br-, and Cl-, and the position of the frequency follows the trend I- > Br- > Cl-. The value measured for [UO2(F)3]- is ∼43 cm-1 lower than the one measured for [UO2(Cl)3]-. Overall, the trend with respect to ν3 position is reproduced well by computed frequencies from DFT.Graphical abstractImage 1
       
  • Characterization of bispecific and mispaired IgGs by native charge-variant
           mass spectrometry
    • Abstract: Publication date: Available online 12 September 2019Source: International Journal of Mass SpectrometryAuthor(s): Wilson Phung, Guanghui Han, Stéphanie G.I. Polderdijk, Michael Dillon, Whitney Shatz, Peter Liu, Bingchuan Wei, Pawankumar Suresh, David Fischer, Christoph Spiess, Aaron Bailey, Paul J. Carter, Jennie R. Lill, Wendy Sandoval Bispecific antibodies (BsAbs) combine the specificities of two antibodies to target different antigens. While production and in vivo assembly of BsAb using a single-cell host is less resource intensive compared to two-cell production, in particular mispaired light chain antibody species are a unique and undesired side product. Different pairing strategies may be employed to increase correct BsAb content, however, the potential presence of mispaired species must be both identified and quantified. Quantitative analysis by mass spectrometry is limited to chromatographic separation of the antibody assemblies due to their similar biophysical properties. This is particularly challenging for distinguishing correctly paired and light chain-scrambled mispaired antibodies which have the same molecular weight. Traditionally, imaged capillary isoelectric focusing (iCIEF) has been employed for analyzing charge-based heterogeneities, but this technique lacks resolution. Here we describe a powerful analytical platform using native weak cation exchange chromatography coupled to a high-resolution mass spectrometer, charge variant mass spectrometry (CV-MS), to characterize bispecific and mispaired antibody species. We investigate elution order through analytical methods and molecular modeling in an effort to understand the intrinsic charge, size and shape differences of these molecules. Although isoelectric points of the variants are similar, localized charge patches are hypothesized to offer sufficient micro-variations to be able to resolve and then identify isobars using CV-MS.Graphical abstractImage 1
       
  • Analysis of the false peaks in extended Hadamard transform ion mobility
           spectrometry
    • Abstract: Publication date: Available online 11 September 2019Source: International Journal of Mass SpectrometryAuthor(s): Yan Hong, Jingming Su, Chaoli Tang, Chaoqun Huang, Sheng Liu, Yannan Chu With the introduction of the extended method in Hadamard transform ion mobility spectrometry (HT-IMS), the modulation defects and the false peaks inherently located in conventional HT techniques could be well suppressed. However, a few false peaks are still located in the demultiplexed data of the extended HT-IMS, which is hard to be explained and seriously degrades the performance of the extended HT techniques. In this research, in order to discover the origin of the false peaks in the extended HT-IMS, the measurements of double and multiple ion peaks with IMS have been implemented and the effects of the peak-peak repulsion on the multiplexed data of HT-IMS have been explored. Results show that in multiplexing IMS, the space charge effect existed between two adjacent ion packets would lead to the shifts (deviations) of the ion signal peaks. Simulation results prove that this tiny shifting in the multiplexed data is another critical reason for the false peaks in the demultiplexed data of extend HT-IMS. This is of positive significance for revealing those unknown false peaks in extended HT-IMS and other similar techniques.Graphical abstractSimulation results of extended multiplexing HTIMS: (a) simulation spectrum of the signal averaging method; b) Multiplexed data of extended HT-IMS, S-matrix order is 255, number of the extended symbol is 4; c) The simulation demultiplexed data of EHT-IMS, in the inset of frame c, parts of the multiplexed data are demonstrated.Image 1
       
  • Tailoring fields of one-sheet and two-sheet planar ion trap mass analyzers
    • Abstract: Publication date: Available online 10 September 2019Source: International Journal of Mass SpectrometryAuthor(s): Nishant Goyal, Atanu K. Mohanty In this paper, a simulation study on tailoring the fields in planar ion trap geometries for making them suitable for mass analysis is presented. Two different planar trap geometries were considered: the first is a One-Sheet Ion Trap Geometry in which the ions are trapped off-plane and the second is a Two-Sheet Ion Trap Geometry in which the ions are trapped in between the two sheets. Both DC and RF potentials were used to trap ions.The fields were tailored to obtain linear trapping fields in these two geometries. This was done by splitting the central electrode into segments and applying suitable DC potentials to them. The potentials were computed using a least square method. The simulations were carried out considering a printed circuit board (PCB) with a Teflon base. The One-Sheet Ion Trap Geometry consists of five electrodes, of which the central electrode is segmented. In Two-Sheet Ion Trap Geometry, each sheet consists of three electrodes, of which the central electrode is segmented.The method outlined in the study is able to tailor fields to be linear as well as mildly superlinear.Graphical abstractImage 1
       
  • Ionization and electron capture for H+ collisions at low keV energy with a
           water-vapor target
    • Abstract: Publication date: Available online 9 September 2019Source: International Journal of Mass SpectrometryAuthor(s): J.R. Legorreta, J. López-Patiño, B.E. Fuentes, F.B. Yousif, H. Martínez We have investigated the total relative ionization and dissociative electron capture cross section for proton collisions with water-vapor molecules within the energy range of 2.5–10 keV. Time of flight mass spectroscopy was employed in the measurements of the atomic and molecular singly charged particles H+, H2+, O+, OH+ and H2O+ as well as the doubly charged particles O++, H2O++, OH++, and the contribution of the different channels was evaluated. Ionization was found to be the dominant reaction channel as expected. The contribution of the singly charged particles was found to be one order of magnitude higher than that of the doubly charged particles.Graphical abstractImage 1
       
  • Self-assembled binuclear Cu(II)-serine tetrameric complex for chiral
           recognition and enantiomeric excess determination of cycloserine in the
           gas phase
    • Abstract: Publication date: Available online 5 September 2019Source: International Journal of Mass SpectrometryAuthor(s): Zhan Gao, Lili Huang, Xiaoyong Zhao, Xinchi Yin, Yuanjiang Pan The different physiological activities including pharmacology and toxicology of chiral drugs have been receiving more and more attention. Today, systematic studies of the biological activity of individual enantiomers are necessary for all listing new racemic drugs. d-cycloserine or d-4-amino-3-isoxazolidinone is a broad-spectrum antibiotic used as a chiral drug for the treatment of tuberculosis. In the current study, the chiral identification of cycloserine and quantification of its enantiomeric excess (ee) was achieved based on the competitive dissociation kinetics of Cu(II)-bound complexes. A novel binuclear Cu(II)-bound diastereomeric complex [(Cu(II))2 (L/d-cycloserine) (Ser)3-3H]+ was formed and the complex structure which has an extraordinary self-assembled compact geometry with two Cu(II) ions bridged together tightly by three carboxylic acids from serines was revealed by both collision-induced dissociation tandem mass spectrometry and density functional theory calculations. The present work reporting binuclear Cu(II)-Ser tetrameric complex-based approach could contribute to the chiral recognition of other similar isoxazolidinone drugs, as well as the better understanding of metal ion complexation by Ser or Ser-containing ligands.Graphical abstractImage 1
       
  • Chiral recognition via abundances of mixed chiral clusters
    • Abstract: Publication date: Available online 5 September 2019Source: International Journal of Mass SpectrometryAuthor(s): M. Nihamkin, A. Kaiser, I. Nemtsov, P. Martini, P. Scheier, Y. Mastai, Y. Toker When chiral molecules form clusters in the gas phase their abundance often exhibits pronounced chiral effects. In this work we pose the question of whether and how this phenomena can be used for chiral recognition: whether by mixing a solution of a test molecule of unknown enantiomeric excess with a known homochiral probe molecule and measuring the abundance of the mixed clusters one can determine the enantiomeric excess of the test molecule. Focusing on mixed amino acid clusters, we will show that the technique is not general, but for many cases is applicable. In doing so, systematic trends governing cluster formation have to be understood, and are discussed below.Graphical abstractImage 1
       
  • Influence of iron redox abilities on the electrospray ionization collision
           induced dissociation of iron complexes with methoxylated flavonoids
    • Abstract: Publication date: Available online 4 September 2019Source: International Journal of Mass SpectrometryAuthor(s): Rafał Frański By using electrospray ionization mass spectrometry two types of iron complexes of methoxylated flavonoids were generated. Depending on the flavonoid structure, the complexes corresponded to the ions [(M-H)2+Fe]+ or [M2+FeCl]+, M stands for the flavonoid molecule. The unpaired electrons obtained as a result of methyl loss and iron reduction were shown to have essential influence on collision induced dissociation of ions [(M-H)2+Fe]+, which may be very useful for determination of the attachment position of methyl group. The loss of M molecule from [M2+FeCl]+ ion and the subsequent decomposition of [M + FeCl]+ enable differentiation between flavone and isoflavone, as well as gives valuable information concerning the positions of hydroxyl and methoxyl groups.Graphical abstractImage 1
       
  • Behavior of transition metal salts during the electrospray ionization
           process
    • Abstract: Publication date: Available online 3 September 2019Source: International Journal of Mass SpectrometryAuthor(s): Jared J. Boock, Richard A. Yost A study of the behavior of transition metal salts during the electrospray ionization (ESI) process using a quadrupole ion trap mass spectrometer and novel ion source is reported. The unique results in both positive and negative modes for multiple salts of 28 different cations are discussed. In positive mode, the metal cations formed clusters with the solvents, following the pattern [M + (solvent)n]+, with maximum observed values for n of 5. In general, transition metals with more than one oxidation state, such as iron, cobalt, and chromium, produced more complicated mass spectra, because the ions formed also included multiples of the anion. In negative mode, the cations formed clusters with the anions of the salts, following the pattern [My + Xn]-. The relationship between y and n correlates to the oxidation state of the cation, with maximum observed values for y and n of 3 and 7, respectively. For some environmental applications, studies in negative mode demonstrate an alternative to specialized elemental analysis instrumentation such as ICP/MS or AMS, as well as complicated sample preparation, such as the use of chelating complexes. This is especially applicable for the analyses of mercury and lead, as these species form only a few, predictable ions. For instance, mercury present in seawater forms a single ion, [Hg + Cl3]-, which can be readily isolated from the sodium chloride clusters in the background with a non-specialized ion trap mass spectrometer using ESI, and can be verified by its characteristic isotopic pattern.
       
  • Class-specific depletion of lipid ion signals in tissues upon formalin
           fixation
    • Abstract: Publication date: Available online 30 August 2019Source: International Journal of Mass SpectrometryAuthor(s): D.R.N. Vos, A.P. Bowman, R.M.A. Heeren, B. Balluff, S.R. Ellis Formalin fixation (FF) is widely used in pathology labs due to its ability to prevent tissue degradation and better preserve tissue morphology, thereby enabling long-term storage especially when combined with paraffin embedding. The detection of lipids and metabolites has recently been demonstrated from formalin fixed paraffin embedded (FFPE) tissues with matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI). However, the resulting lipid profiles differ markedly from those typically generated from fresh frozen tissue. To shed light onto the effects of formalin-induced modifications on lipids in tissues 24 h-formalin-fixed and untreated mouse and rat kidney tissues were compared using time-of-flight matrix-assisted laser/desorption-mass spectrometry imaging (MALDI-MSI) and Fourier transform MALDI-MSI combined with tandem mass spectrometry. These analyses revealed distinct and class-specific depletion of ion signals of certain lipid species upon FF, in particular for those containing amine functionalities. As MSI moves closer towards clinical application and necessitates increased analysis of formalin fixed tissues our results provide a route to rationalize the observed tissue-dependent lipid compositions observed from such tissues.Graphical abstractImage 1
       
  • Gas-phase vibrations of the anionic, hydrogen-bonded dimer of
           9-methylguanine
    • Abstract: Publication date: Available online 27 August 2019Source: International Journal of Mass SpectrometryAuthor(s): Christopher Switzer, Jonathan Martens, Lisanne Kempkes, Giel Berden, Jos Oomens, Thomas Hellman Morton The gas-phase InfraRed Multiple Photon Dissociation (IRMPD) spectra in the fingerprint region of the anion (m/z 163) and mono-deprotonated homodimer of 9-methyl-guanine (2, m/z 329) and its d5 analogue (2-d5) are reported here. The anionic dimer is reverse Watson-Crick paired with the hydrogen bonding pattern ADD/DAA (where A stands for acceptor and D stands for donor), in which the site of negative charge is unambiguously found to be N1. The match between experimental vibrational spectra and DFT-computed spectra is good with the exception of the region between 2000 and 2900 cm−1 that contains symmetrical and antisymmetrical N–H stretches of the adjacent hydrogen-bond donor-donor pair.Graphical abstractImage 1
       
  • A simple and precise method for measurement of serum free carnitine and
           acylcarnitines by isotope dilution HILIC-ESI-MS/MS
    • Abstract: Publication date: Available online 21 August 2019Source: International Journal of Mass SpectrometryAuthor(s): Mo Wang, Ruiyue Yang, Hongna Mu, Jie Zeng, Tianjiao Zhang, Weiyan Zhou, Siming Wang, Yueming Tang, Hongxia Li, Chuanbao Zhang, Wenxiang Chen, Jun Dong Recent studies have found that carnitine and acylcarnitines (AcyCNs) are potential biomarkers for many metabolic diseases, including inherited disorders, diabetes and coronary atherosclerotic artery disease (CAD). Here we presented and validated a method for measurement of free carnitine and twelve AcyCNs in human serum by using electrospray ionization tandem mass spectrometry (ESI-MS/MS). Serum samples were mixed with isotopic labeled internal standards and extracted with isopropanol. Carnitine and AcyCNs were separated within 5min by isocratic elution on a hydrophilic interaction liquid chromatographic column (HILIC) and detected with electrospray ionization (ESI) in positive ion mode with multiple reaction monitor (MRM) mode. This method was linear in response with correlation coefficients higher than 0.999. Analytical recoveries were 89.4%–105.4% with an average of 98.7%. The intra-run and total imprecisions were 0.9–4.7% and 1.5–14.1%, respectively. Stability tests showed that all the compounds were stable in serum for at least 6 month at −80 °C, but unstable when stored at room temperature (RM) and 4 °C.Serum carnitine and AcyCNs concentrations of 472 apparently healthy subjects were analyzed. Significant associations between the metabolites and traditional CAD risk factors were observed. The established HILIC–ESI-MS/MS method was simple, precise, and sensitive and may be used as an efficient tool in CAD risk assessment and research.Graphical abstractImage 1
       
  • Evaluation by LA-MC-ICP-MS of NIST 612 Pb isotopic composition as
           external reference material and a new proxy for environmental
           characterization using (carbonatic) bivalves shells
    • Abstract: Publication date: Available online 15 August 2019Source: International Journal of Mass SpectrometryAuthor(s): Marcio Inacio, Isabella Robert, Armando Dias Tavares, Igor Pessoa, Maria Virgínia Alves Martins, Bruna Saar de Almeida, Mauro Cesar Geraldes The main aims of this work are: to evaluate by laser-ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS) the Pb isotopic composition of the reference material NIST 612 (a calcium-sodium aluminosilicate glass); to verify the potentialities of using the NIST SRM 612 as calibration standard for environmental studies on (carbonatic) bivalves and; to apply this standard in for quantifying the ontogenic (temporal) variations of Pb isotopes in two species of bivalve shells, Glycymeris undata Linnaeus 1758 and Pitar fulminatus (Menke, 1828) from Ilha Grande Bay (Rio de Janeiro, SE Brazil), in order to identify the Pb isotopic signatures and; propose a new tool to be applied in biological and environmental characterization studies.In these analyses a Neptune sector multicoletors mass spectrometer and 193 nm Excimer Laser Ablation device also were used. The averages for isotope ratios,206Pb/204Pb = 16.9027 ± 0.0011, 207Pb/204Pb = 15.4446 ± 0014, 208Pb/204Pb = 36.5544 ± 0.0044, 208Pb/207Pb = 0.91374 ± 0.00002 and 207Pb/206Pb = 0.9134 ± 0.0001, the calculated mass fractionation averages, of 0.07%, and the quantification procedures based on the external calibration, are in agreement with the true values obtained in the literature.The results of this work, obtained with the LA-MC-ICP-MS system, strongly support the hypothesis that abundance of Pb isotopes in carbonates can be determined on the basis of external calibration using the NIST 612 standard, despite the large difference between the CaCO3 composition and the glass silicate that compose this reference material. This fact suggests that NIST glass standards can be applied to several types of materials, whose geochemical composition of the matrix is not necessarily equivalent to that of the standards, by means of a careful setup of the LA-ICP-MS system. The obtained results confirm the hypothesis that it is possible to perform isotope analyzes of lead in bivalve shells using the LA-ICP-MS technique. The Pb isotope results obtained in layers of bivalve P. fulminatus allowed to identify the biological and environmental factors that influence the Pb isotopic ratios in the shell.Graphical abstractImage 1
       
  • A multi-reflection time-of-flight setup for the improvement and
           development of new methods and the study of atomic clusters
    • Abstract: Publication date: Available online 24 July 2019Source: International Journal of Mass SpectrometryAuthor(s): S. Knauer, P. Fischer, G. Marx, M. Müller, M. Rosenbusch, B. Schabinger, L. Schweikhard, R.N. Wolf A multi-reflection time-of-flight (MR-ToF) device has been setup for the development and test of new MR-ToF techniques and for future applications in atomic cluster research. The instrument, consisting of a laser-ablation ion source, a quadrupole bender, the MR-ToF analyzer (with ion mirrors and in-trap lift), and a channeltron detector, is described in detail and characterized with respect to preliminary results of its performance parameters. In addition, cluster ions were mass selected in the MR-ToF device and photodissociated. The charged fragments were stored and mass analyzed in a proof-of-principle MS/MS experiment where both MS steps were performed in the MR-ToF operation mode.Graphical abstractImage 1
       
 
 
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