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EX SITU DETERMINATION OF FREELY DISSOLVED CONCENTRATIONS OF HYDROPHOBIC ORGANIC CHEMICALS IN SEDIMENTS AND SOILS: BASIS FOR INTERPRETING TOXICITY AND ASSESSING BIOAVAILABILITY, RISKS AND REMEDIATION NECESSITY
Jonker, M.T.O., R.M. Burgess, U. Ghosh, P.M. Gschwend, S.E. Hale, R. Lohmann, et al.
Nature Protocols 151800-1828(2020)

A passive sampling protocol was developed to determine the freely dissolved concentration (Cfree) of hydrophobic organic chemicals in sediment and soil samples. The protocol describes the selection and preconditioning of the passive sampling polymer, critical incubation system component dimensions, equilibration and equilibrium condition confirmation, quantitative sampler extraction, quality assurance/control issues, and final calculations of Cfree. The full procedure requires several weeks, depending on the sampler used, due to prolonged equilibration times. However, hands-on time, excluding chemical analysis, is approximately three days for a set of ~15 replicated samples.



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