Passive Sampling and Dosing of Aquatic Organic Contaminant Mixtures for Ecotoxicological Analyses.

摘要: Toxicity results from exposure to mixtures of organic contaminants. Assessing this using ecotoxicity bioassays involves sampling the environmental mixture and then introducing into test. The first step is accounting for bioavailable levels all constituents. Passive specifically targets these fractions but sampler-accumulated varies with compound sampler properties as well time. second reproducing maintaining sampled constituents in bioassay. extraction spiking always leads a skewed profile Alternatively, recovered passive samplers might be directly used dosing mode. Here, reproduced contaminant depends on whether kinetic or equilibrium applies. These concepts were tested determining combined toxicity laboratory field aquatic contaminants Microtox ER-Calux bioassays. Aqueous sample spiking, compared analytical show that correct way profile, reproduce maintain test, by combining dosing.