International Journal of Mass Spectrometry

Journal: International Journal of Mass Spectrometry

Abbreviation

Int. j. mass spectrom.

Publisher

Elsevier

ISSN

1387-3806
1873-2798

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Publications 1 - 10 of 37

Numerical algorithm for the accurate evaluation of ion beams in transversal modulation ion mobility spectrometry: Understanding realistic geometries
Barrios-Collado, Cesar; Vidal-de-Miguel, Guillermo (2015)
International Journal of Mass Spectrometry
MALDI-TOF and cluster-TOF-SIMS imaging of Fabry disease biomarkers
Touboul, David; Roy, Sandrine; Germain, Dominique P.; et al. (2007)
International Journal of Mass Spectrometry
A new high-pressure mass spectrometer with improved reaction temperature measurement
Likholyot, Alexander; Hovey, Jamey K.; Seward, Terry M. (2005)
International Journal of Mass Spectrometry
Rovibronic photoionization dynamics of asymmetric-top molecules
Willitsch, Stefan; Merkt, Frédéric (2005)
International Journal of Mass Spectrometry
High precision titanium isotope measurements on geological samples by high resolution MC-ICPMS
Leya, Ingo; Schönbächler, Maria; Wiechert, Uwe; et al. (2007)
International Journal of Mass Spectrometry
Evidence for laser-induced redox reactions in matrix-assisted laser desorption/ionization between cationizing agents and target plate material: A study with polystyrene and trifluoroacetate salts
Zeegers, Guido P.; Steinhoff, Robert F.; Weidner, Steffen M.; et al. (2017)
International Journal of Mass Spectrometry
Positive and negative analyte ion yield in matrix-assisted laser desorption/ionization revisited
Hillenkamp, Franz; Wäfler, Esther; Jecklin, Matthias C.; et al. (2009)
International Journal of Mass Spectrometry
The most commonly accepted model for the formation of analyte ions in MALDI-MS assumes a primary ionization of the matrix e.g., by photoionization, leading among others to stable protonated and deprotonated matrix ions, respectively. Peptide and protein ions are then formed by secondary proton transfer reactions in the expanding plume. This model had been checked experimentally by comparing the yield of positive to negative ions of three peptides (Bradykinin, Angiotensin I and Fibrinopeptide A) and six matrices (α-cyano-4-hydroxycinnamicacid (CHCA), 2,5-dihydroxybenzoicacid (DHB), 6-aza-2-thiothymine (ATT), 4-nitroaniline (4-NA), 2-amino-5-nitro-4-picoline (ANP), 5-aminoquinolione (5-AQ)), differing in gas-phase basicity by about 100 kJ/mole [M. Dashtiev, E. Wäfler, U. Röhling, M. Gorshkov, F. Hillenkamp, R. Zenobi, Int. J. Mass Spetrom. 268 (2007) 122]. The data have been revisited for a more general and in-depth analysis. Model predictions are presented for a wide range of experimental parameters, in particular for ranges of the gas-phase basicity and acidity of analyte and matrix and for different molar ratios of analyte to matrix as well as the yield of primary matrix ions. It is shown that the observed ion yields cannot be explained by any single and consistent set of parameters. It is concluded that the existing simple model needs be modified to fully explain the experimental findings. Such modifications should primarily address the formation of negative matrix and analyte ions.
Application of MC-ICPMS to the precise determination of tellurium isotope compositions in chondrites, iron meteorites and sulfides
Fehr, Manuela; Rehkämper, Mark; Halliday, Alex N. (2004)
International Journal of Mass Spectrometry
3 MV accelerator mass spectrometry measurements of ³⁶Cl using the Isobar Separator for Anions
Flannigan, Erin L.; Kieser, William E.; Crann, Carley A.; et al. (2025)
International Journal of Mass Spectrometry
A second low-energy injection line containing the Isobar Separator for Anions (ISA), a radiofrequency quadrupole reaction cell system, was installed on the 3 MV tandem accelerator system at the A. E. Lalonde (AEL) accelerator mass spectrometry (AMS) Laboratory. The suppression of 36S via anion-gas reaction with NO2 was evaluated for measurements of 36Cl reference materials and a dilution series, using a 3 MV AMS system. The dilution series, with 36Cl/Cl ratios ranging from 10−11 to 10−15, were measured in comparison with external measurement. 36Cl/Cl blank levels of (7 ± 4) x10−15 were reached. While ISA-AMS is not currently able to achieve sufficient separation for most 36Cl applications, these measurements show progress towards routine measurement of 36Cl and demonstrate the steps required to validate such measurements on lower energy AMS systems.
Deciphering the iron isotope message of the human body
Walczyk, Thomas; von Blanckenburg, Friedhelm (2005)
International Journal of Mass Spectrometry

Publications 1 - 10 of 37

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