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Issue 5, 2003
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Development of an integrative passive sampler for the monitoring of organic water pollutants

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Abstract

The development of convenient and competitive devices and methods for monitoring of organic pollutants in the aquatic environment is of increasing interest. An integrative passive sampling system has been developed which consists of a solid poly(dimethylsiloxane) (PDMS) material (tube or rod), acting as hydrophobic organic receiving phase, enclosed in a water-filled or an air-filled low-density polyethylene (LDPE) membrane tubing. These samplers enable the direct analysis of the pollutants accumulated during exposure in the receiving phase by thermodesorption–GC/MS, avoiding expensive sample preparation and cleanups. The capabilities of these sampling devices were studied for the sampling of 20 persistent organic pollutants (chlorobenzenes, hexachlorocyclohexanes, p,p′-DDE, PAHs, and PCBs) in laboratory exposure experiments. For the three sampler designs investigated the uptake of all target analytes was integrative over exposure periods up to 9 days (except PCB 101). The determined sampling rates range from 4 to 1340 µl h−1 for the water-filled samplers and from 20 to 6360 µl h−1 for the air-filled ones, respectively. The sampling rate of the analytes is dependent on their molecular weight, partition between water and sampler media (PDMS, polyethylene, water, air) and also of the sampler design. The passive samplers enable the estimation of time-weighted average (TWA) concentration of water pollutants in the lower ng l−1 to pg l−1 range.

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Publication details

The article was received on 27 Mar 2003, accepted on 10 Jul 2003 and first published on 01 Aug 2003


Article type: Paper
DOI: 10.1039/B303497F
Citation: J. Environ. Monit., 2003,5, 813-822
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    Development of an integrative passive sampler for the monitoring of organic water pollutants

    L. Wennrich, B. Vrana, P. Popp and W. Lorenz, J. Environ. Monit., 2003, 5, 813
    DOI: 10.1039/B303497F

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