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High-throughput gas chromatography for volatile compounds analysis by fast temperature programming and adsorption chromatography

Gras, R, Hua, Y and Luong, J 2017 , 'High-throughput gas chromatography for volatile compounds analysis by fast temperature programming and adsorption chromatography' , Journal of Separation Science, vol. 40, no. 9 , pp. 1979-1984 , doi: 10.1002/jssc.201700016.

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Abstract

The synergy of combining fast temperature programming capability and adsorption chromatography using fused silica based porous layer open tubular columns to achieve high throughput chromatography for the separation of volatile compounds is presented. A gas chromatograph with built-in fast temperature programming capability and having a fast cool down rate was used as a platform. When these performance features were combined with the high degree of selectivity and strong retention characteristic of porous layer open tubular column technology, volatile compounds such as light hydrocarbons of up to C7, primary alcohols, and mercaptans can be well separated and analyzed in a matter of minutes. This analytical approach substantially improves sample throughput by at least a factor of ten times when compared to published methodologies. In addition, the use of porous layer open tubular columns advantageously eliminates the need for costly and time-consuming cryogenic gas chromatography required for the separation of highly volatile compounds by partition chromatography with wall coated open tubular column technology. Relative standard deviations of retention time for model compounds such as alkanes from methane to hexane were found to be less than 0.3% (n = 10) and less than 0.5% for area counts for the compounds tested at two levels of concentration by manual injection, namely, 10 and 1000 ppm v/v (n = 10). Difficult separations were accomplished in one single analysis in less than 2 min such as the characterization of 17 components in cracked gas containing alkanes, alkenes, dienes, branched hydrocarbons, and cyclic hydrocarbons.

Item Type: Article
Authors/Creators:Gras, R and Hua, Y and Luong, J
Keywords: adsorption chromatography, fast gas chromatography, fast temperature programming, PLOT columns
Journal or Publication Title: Journal of Separation Science
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
ISSN: 1615-9306
DOI / ID Number: 10.1002/jssc.201700016
Copyright Information:

Copyright 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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