Trace analysis of halogenated hydrocarbons in gaseous samples by on-line enrichment in an adsorption trap, on-column cold-trapping and capillary gas chromatography. I.Method and instrumentation

T.H.M. Noij, P. Fabian, R. Borchers, F. Janssen, C.A.M.G. Cramers, J.A. Rijks

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Abstract

A method is described for the determination of halocarbons in gaseous samples down to the ppt level (1:1012, v/v), consisting of successive on-line sub-ambient enrichment on an adsorbent, on-column cryofocusing, capillary gas chromatography and electron-capture detection. The quantitative aspects of sample transfer throughout the system, trapping/desorption efficiencies and maximum sample volumes of different adsorbents were studied, as well as the efficiency and focusing effect of on-column cold-trapping on capillary OV-101 and alumina porous layer open-tubular columns. The analytical power of the method is demonstrated in the analysis of stratospheric air and an highly complicated industrial problem, viz., the determination of ppb amounts of sulphur-fluorine compounds in a matrix of polluted sulphur hexafluoride.
Original languageEnglish
Pages (from-to)343-356
JournalJournal of Chromatography, A
Volume393
Issue number3
DOIs
Publication statusPublished - 1987

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