In most investigations on water quality it is not possible to determine the relationship between toxicological and chemical parameters as a consequence of different isolation and sample preparation techniques. A combined research made by the analytical-chemical and biological section of KIWA has led to the development of a single isolation and sample preparation method for organic micro-pollutants in water, suitable for both toxicological and chemical measurements as the Ames test, group parameters (OCI, ON, OS, OP), GC-MS and H.P.L.C. An automated installation for the adsorption of volatiles to Tenax and of slightly-volatile and non-volatile compounds at pH 7,2 and 9 to XAD-4 has been built. Following the adsorption the volatiles are thermically desorbed from the Tenax. The XAD columns are eluted with ethanol and an ethanol-cyclohexane mixture. The eluates are dried and concentrated by means of an azeotropic distillation. This procedure has been automated as well.
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Noordsij et al. (1983) studied this question.