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Ascertaining Hydrogen-abstraction Reaction Efficiencies of Halogenated Organic Compounds on Electron Ionization Mass Spectrometry by Tang, Caiming; Tan, Jianhua; Fan, Yujuan; Peng, Xianzhi is a scholarly article available to read on EtoBox.

What is Ascertaining Hydrogen-abstraction Reaction Efficiencies of Halogenated Organic Compounds on Electron Ionization Mass Spectrometry about?

H-abstraction reactions occurring on electron ionization mass spectrometry (EI-MS) are a long-standing and crucial topic in MS research. Yet some critical relevant mechanisms are controversial and ambiguous, and information about the EI-induced H-abstraction reactions of halogenated organic compounds (HOCs) is completely in the dark. This study provides a systematic investigation of H-abstraction reactions of HOCs taking place on EI source using 13C6-hexachlorobenzene (13C6-HCB) and 13C6-hexabromobenzene (13C6-HBB) as exemplary compounds by gas chromatography high resolution mass spectrometry (GC-HRMS). The H-abstraction efficiencies were evaluated with the MS signal intensity ratios of ions with H-abstraction relative to the corresponding original ions (without H-abstraction). Ion source temperatures, EI energies and numbers of heavy isotope atoms (37Cl or 81Br) of isotopologues were investigated in terms of their effects on the H-abstraction efficiencies. The H-abstraction efficiencies of individual isotopologues generally decreased from the first to the last isotopologues of respective ions, and those of individual ions were different from each other, with the highest values of

Author

Tang, Caiming; Tan, Jianhua; Fan, Yujuan; Peng, Xianzhi

Published

2019

Language

EN