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Needle concentrator for gas chromatographic determination of BTEX in aqueous samples
Róbert Kubinec1, Victor G Berezkin, Renáta Górová
1Faculty of Natural Sciences, Chemical Institute, Comenius University, Mlynská Dolina CH-2, SK-842 15 Bratislava, Slovak Republic. kubinec@fns.uniba.sk
Abstract:
A simple method of solventless extraction of volatile organic compounds (BTEX) from aqueous samples was developed and validated. A new arrangement of the full volume inside needle capillary adsorption trap (INCAT) device with Porapak Q as a sorbent material and wet alumina as a source of desorptive water vapour flow in a closed analytical system is presented. The analytical characteristics of developed device and of compared purge-and-trap (PTI) device for BTEX compounds are similar; the limits of detection as well as quantification are lower than 1 microg l(-1).
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