Determining the chemical activity of hydrophobic organic compounds in soil using polymer coated vials |
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| Authors: | Fredrik Reichenberg Foppe Smedes Jan-Åke Jönsson Philipp Mayer |
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| Institution: | (1) Department of Environmental Chemistry and Microbiology, National Environmental Research Institute, University of Aarhus, 4000 Roskilde, PO Box 358, Denmark;(2) Division of Analytical Chemistry, Lund University, S-221 00 Lund, PO Box 124, Sweden;(3) Ministry of Transport, Public Works and Water management, National Institute for Costal and Marine Management/RIKZ, 9750 AE Haren, PO Box 207, Netherlands |
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| Abstract: | Background In soils contaminated by hydrophobic organic compounds, the concentrations are less indicative of potential exposure and distribution
than are the associated chemical activities, fugacities and freely dissolved concentrations. The latter can be measured by
diffusive sampling into thin layers of polymer, as in, for example, solid phase micro-extraction. Such measurements require
equilibrium partitioning of analytes into the polymer while ensuring that the sample is not depleted. We introduce the validation
of these requirements based on parallel sampling into polymer layers of different thicknesses. |
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