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False results in headspace-gas chromatographic analysis of trihalomethanes in swimming pool water due to elevated headspace temperatures



False results in headspace-gas chromatographic analysis of trihalomethanes in swimming pool water due to elevated headspace temperatures



Journal of Chromatography 648(1): 294-298



The application of a headspace GC method for the determination of trihalomethanes (THMs) in water is described for the case of swimming pool water. As a consequence of chlorination, swimming pool water contains, besides THMs, many other halogenated compounds. Among these, the trihaloacetic acids may interfere with THM determination because they are decarboxylated to the related THMs at the usually applied headspace temperatures. This disturbing effect was investigated at different temperatures for real swimming pool water samples. It occurs down to 40°C and was found to be avoidable at a headspace temperature of 33°C or less.

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Accession: 031417399

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DOI: 10.1016/0021-9673(93)83315-j


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