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Measurement of onset potentials for proton transfer reactions with a triple quadrupole instrument
Author(s) -
Bursey Maurice M.,
Blackburn Thomas R.,
Meyerhoffer William J.,
Mattson William A.
Publication year - 1990
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210250410
Subject(s) - ion , exothermic reaction , atomic physics , proton , ionization , collision , triple quadrupole mass spectrometer , endothermic process , chemistry , quadrupole , transfer (computing) , physics , nuclear physics , mass spectrometry , selected reaction monitoring , tandem mass spectrometry , organic chemistry , chromatography , adsorption , computer security , parallel computing , computer science
Abstract Problems with the treatment of data from the study of both exothermic and endothermic ion‐molecule reactions are discussed. Recommendations are (i) to extrapolate data from an obviously linear region in the plot of ratios of secondary to primary ion intensity which appears ∼1–3 V above the value of the onset potential; (ii) to use ionization methods that give low internal energies to primary ions; (iii) to set for moderately high resolution; (iv) to check the stability of the primary ion current frequently; (v) to pay special attention heed to source and collision region pressure stability; and (vi) to keep collision region pressures below 0.6 mPa.