Bioassays passive sampling

This section describes a number of examples of the field deployment of a selection of potential monitoring tools for use within the WFD. Three types of tools (on-site based analytical methods, passive samplers and bioassays) are described. Each methodology was assessed by comparing its performance with that of the currently accepted monitoring regime (spot sampling combined with classical chemical analysis). In some cases the emerging methods provided information that was different from that provided by the classical methods. 

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