✦ LIBER ✦

Basic equations in continuous gas extraction and their application to headspace analysis

✍ Scribed by A.G. Vitenberg; B.V. Ioffe

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 471 KB
Volume: 471
Category: Article
ISSN: 1873-3778
DOI: 10.1016/s0021-9673(00)94154-2

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✦ Synopsis

The evolution of ideas on the rules of continuous gas extraction based on dynamic headspace analysis is outlined. The application of a simpler exponential equation that describes well the course of gas extraction under the conditions of a sufficiently small volume of the vapour phase is recommended for practical purposes. The possibility of performing under non-equilibrium conditions not only stripping but also variants of the analysis that do not require full extraction of the sample components is considered. The expediency of the application of continuous gas extraction is demonstrated by the determination of volatile substances with low liquid-gas partition coefficients, where high sensitivity can be achieved by direct headspace analysis under static conditions.

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