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ADVANCING THE USE OF PASSIVE SAMPLING IN RISK ASSESSMENT AND MANAGEMENT OF SEDIMENTS CONTAMINATED WITH HYDROPHOBIC ORGANIC CHEMICALS: RESULTS OF AN INTERNATIONAL EX SITU PASSIVE SAMPLING INTERLABORATORY COMPARISON
Jonker, M.T.O., S.A. van der Heijden, D. Adelman, J.N. Apell, R.M. Burgess, Y. Choi, et al.
Environmental Science & Technology 52:3574-3582(2018)

The main objectives of the interlaboratory comparison project were to map the state of the science in passive sediment sampling, identify sources of variability, provide recommendations and practical guidance for standardized passive sampling, and advance the use of passive sampling in regulatory decision-making by increasing confidence in the use of the technique. Performed by a consortium of 11 laboratories, the experiments encompassed 14 passive sampling formats on 3 sediments for 25 target chemicals (PAHs and PCBs). The resulting overall interlaboratory variability was large (a factor of ~10), but standardization of methods halved this variability. The remaining variability was due primarily to factors not related to passive sampling itself, i.e., sediment heterogeneity and analytical chemistry. Excluding the latter source of variability, results showed that passive sampling results can have a high precision and a very low intermethod variability (< factor of 1.7). https://pubs.acs.org/doi/pdfplus/10.1021/acs.est.7b05752



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