Fig. 2From: A field study in support of the monitoring of priority substances in German freshwater fish: derivation of fillet-to-whole fish conversion factorsConcentrations of PFOS in fish composite samples from six sites. Data are presented as ng g−1 (µg kg−1) on wet weight (ww) basis. C chub, R roach, B bream, W whitefish, P perch, Fi fillet, WF whole fish. Horizontal lines mark the EQS for PFOS (9.1 µg kg−1 ww)Back to article page