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Screening of short- and medium-chain chlorinated paraffins in.pdf

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Screening of short- and medium-chain chlorinated paraffins in

Environmental Pollution 144 (2006) 248e254 /locate/envpolScreening of short- and medium-chain chlorinated paraffins in selected riverine sediments and sludge from the Czech Republic Petra Pr?ibylova?, Jana Kla?nova?*, Ivan Holoubek RECETOXdResearch Centre for Environmental Chemistry and Ecotoxicology, Masaryk University, Kamenice 3/126, 625 00 Brno, Czech Republic Received 13 July 2005; received in revised form 11 November 2005; accepted 11 December 2005 Data on contamination of sediments from industrial areas fill the informational gap in the field of contamination of the Central Europe by chlorinated paraffins. Abstract Wide distribution of chlorinated paraffins in the environment has already been demonstrated in several studies; however, information about their levels in the Central Europe is still very limited. First study focused on the SCCP contamination of the Czech aquatic environment have been performed recently, and its results motivated the authors to analyze sediments from a wide set of the Czech rivers in order to obtain more detailed information. Thirty-six sediment samples from eleven rivers and five drainage vents neighboring the chemical factories were analyzed; special attention was paid to the industrial areas. For the first time in the Czech Republic, medium-chain in addition to short-chain chlorinated paraffins were analyzed using GC-ECNI-MS. Chlorinated paraffins were detected in sediment samples on the concentration levels up to 347 ng g1 for short-chain chlorinated paraffins, and 5575 ng g1 for medium-chain chlorinated paraffins. Average chlorination degree of SCCPs was 65%. 2006 Elsevier Ltd. All rights reserved. Keywords: Chlorinated paraffins; Polychlorinated n-alkanes; Sediment; Gas chromatographyeelectron capture negative ion trap mass spectrometry; Czech Republic1. Introduction Chlorinated paraffins (CPs) are industrially produced mixtures of compounds with the general formula of CnH2n t 2zClz. Based on the chain length, they are c