Ionization in Flames. II. Mass-Spectrometric and Mobility Analyses for the Flame Ionization Detector

An earlier paper by two of the present authors gave an electrical theory of the flame ionization detector. Results of mass spectrometric and mobility studies of the positive ion species in the detector are presented here. For all organic additives, at concentrations around 1 %, the charge is carried...

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Bibliographic Details
Published in:Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences Mathematical and physical sciences, 1978-03, Vol.360 (1701), p.265-277
Main Authors: Bolton, H. C., Grant, Janine, McWilliam, I. G., Nicholson, A. J. C., Swingler, D. L.
Format: Article
Language:English
Subjects:
Ammonia
Electric current
Flame ionization
Flames
Hydrates
Ion currents
Ions
Mass spectra
Mass spectrometers
Shutters
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Summary:An earlier paper by two of the present authors gave an electrical theory of the flame ionization detector. Results of mass spectrometric and mobility studies of the positive ion species in the detector are presented here. For all organic additives, at concentrations around 1 %, the charge is carried by a group of ions, H 30+(H20 )w, where n is a small integer. These ions behave effectively as a single ion in mobility experiments because an equilibrium distribution is maintained as they drift towards the collector electrode. At low concentrations of additive a second group of ions, N H ^(H 20 )n, becomes comparable in number with the H 30 +(H20 )n group. This alters the electrical characteristics of the detector but does not affect its linearity.
ISSN:1364-5021
0080-4630
1471-2946
2053-9169
DOI:10.1098/rspa.1978.0067