Abstract
The critical step in the determination of water solubilitiy (S w) and octanol-water partition coefficient (K ow) of hydrophobic organic chemicals by using the generator-column technique and the slow-stirring procedure, respectively, is the exact quantification of the low water-phase concentrations of the substances under investigation. We have tested the applicability of solid-phase microextraction (SPME) and gas chromatography with seven chlorinated organic compounds. The substances cover a S w range from 500 mg/L to 7 ng/L and a log K ow range from 3 to 8. The results show that SPME can be a valuable alternative to common preconcentration techniques in the quantification of hydrophobic organics in pure and octanol-saturated water. The apparent SPME distribution constants K SPME (obtained with the 100 μm-PDMS fiber for analyte’s partitioning between fiber coating and aqueous sample) do not correlate directly with octanol/water partition coefficients and thus cannot be recommended as a surrogate parameter for K ow.
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Received: 15 January 1997 / Revised: 2 May 1997 / Accepted: 8 May 1997
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Paschke, A., Popp, P. & Schüürmann, G. Water solubility and octanol/water-partitioning of hydrophobic chlorinated organic substances determined by using SPME/GC. Fresenius J Anal Chem 360, 52–57 (1998). https://doi.org/10.1007/s002160050641
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DOI: https://doi.org/10.1007/s002160050641