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Table 3 Fillet-to-whole fish conversion factors and equations for priority substances (for all fish, n = 36, and for 3–4 years/3–5 years fish, n = 20)

From: A field study in support of the monitoring of priority substances in German freshwater fish: derivation of fillet-to-whole fish conversion factors

Priority substanceConversion factor (or equation) fillet-to-whole fish (for all fish, n = 36) (significance level, one tailed)Conversion factor fillet-to-whole fish (for 3–4 years/3–5 years fish, n = 20) (significance level, one tailed)
PCDD/F + dl-PCBln (conc.whole fish) = 1.56 + 0.63 * (ln conc.fillet) (p < 0.0001)5.3 (p < 0.0001)
HCB3.7 (p < 0.0001)3.6 (p < 0.0001)
PBDE5.2 (p < 0.0001)5.4 (p < 0.0001)
HBCDD1.7 (p < 0.0001)1.8 (p = 0.030)a
PFOS2.6 (p < 0.0001)2.7 (p < 0.0001)
Mercuryln (conc.whole fish) = − 0.031 + 0.949 * (ln conc.fillet) (p < 0.0001)0.81 (p < 0.0001)
  1. The conversion method was derived according to the approach described by Bevelhimer et al. [26]
  2. aOutliers removed (n = 15)