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Studies on a Helium Ionization Detector for Gas Chromatography

✍ Scribed by X.D. Tian; W.J. Yang; A.M. Yu; Q.H. Jin

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
264 KB
Volume
52
Category
Article
ISSN
0026-265X

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✦ Synopsis

A new type of helium direct current plasma ionization detector (HeDCPID) for gas chromatography has been developed. The detector is simple in construction and can function with helium as the carrier gas without the need to subject the helium to excessive purification procedures. The noise level of the HeDCPID was below (1.2 \times 10^{-1.3} \mathrm{~A}) when a stable plasma was obtained at applied potential of (1200 \mathrm{~V}). Preliminary experiments indicate that the HeDCPID can detect all compounds and it appears to be extremely inexpensive to fabricate. The performance of the HeDCPID was evaluated in terms of the sensitivity for hydrogen, oxygen, nitrogen, and other gaseous substances. The sensitivities to these gases were shown to be in the range of (10^{-13}-10^{-11} \mathrm{~g} / \mathrm{ml}). (8) 1995 Academic Pres. Inc.

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