Indirect hydrogen monitoring by chemi-ionisation following an associative ionisation pathway after metastable helium atoms production by electron impact ionisation: Protonation and deuteration of carrier gas

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Serval ID
serval:BIB_838796B08185
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Indirect hydrogen monitoring by chemi-ionisation following an associative ionisation pathway after metastable helium atoms production by electron impact ionisation: Protonation and deuteration of carrier gas
Journal
International Journal of Mass Spectrometry
Author(s)
Varlet V., Guiliani N., Augsburger M.
ISSN
1387-3806
ISSN-L
1387-3806
Publication state
Published
Issued date
2015
Peer-reviewed
Oui
Volume
376
Pages
27-31
Language
english
Abstract
Gas chromatography (GC) is an analytical tool very useful to investigate the composition of gaseous mixtures. However, hydrogen (H2) detection after a GC separation is only possible with a Thermal Conductivity Detector (TCD), a Helium Ionisation Detector (HID) or expensive Atomic Emission Detector (AED). Recently, indirect H2 detection by GC coupled to mass spectrometry (MS) was demonstrated but the mechanism of carrier gas protonation remained unclear. With electron impact as ionisation source of MS and helium (He) as GC carrier gas, H2 is not ionised according the expected Penning ionisation neither according to the Associative ionisation. Rearrangement ionisation (RI) was found to be the main channel for H2 and D2 ionisation under GC-MS conditions used in most of laboratories using GC-MS, leading to the formation of [He−H]+ and [He−D]+ ions.
Web of science
Create date
07/01/2015 12:13
Last modification date
20/08/2019 14:43
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