Comparative Study of the Use of Flow-Through Systems with and without Air Segmentation for Determination of Phenols by Solid-Phase Microextraction–Gas Chromatography.

Autor:	Nome, R. C., Carasek, E.
Zdroj:	Chromatographia; Mar2004, Vol. 59 Issue 5/6, p387-391, 5p
Abstrakt:	Two procedures have been evaluated for SPME of phenols from liquids—flow-through extraction and a system based on flow-through extraction in which the sample stream is segmented with air bubbles. For testing the segmented flow-through procedure, free and derivatized phenols were absorbed directly from an aqueous solution by means of an 80-μm polyacrylate fiber and a 100-μm polydimethylsiloxane fiber, respectively. The amounts of analytes absorbed by the fibers, and the precision achieved, were compared for the two procedures. The results indicated extraction, including that of the more volatile phenols, was better when the air-segmented flow-through extraction cell was used. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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