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Table 2 Arithmetic means and standard deviations for chemical parameters

From: Contaminant levels in the European eel (Anguilla anguilla) in North Rhine-Westphalian rivers

  n a Σ PCDD/PCDF (pg WHO2005TEQ/g) Σ PCDD/PCDF + dl-PCB (pg WHO2005TEQ/g) Indicator PCB (ng/g) HCB (μg/kg) Σ PBDE (μg/kg) PFOS (μg/kg) Hg (mg/kg)
Rhein Bonn 9/9 1.8 ± 0.7 17.0 ± 5.9 253 ± 81 23.2 ± 14.7 18.4 ± 5.6 22.9 ± 9.8 0.210 ± 0.116
Rhein Düsseldorf 7/11 1.2 ± 0.7 19.4 ± 7.9 382 ± 152 27.8 ± 11.9 20.7 ± 9.9 27.5 ± 23.6 0.165 ± 0.057
Rhein Rees 9/9 4.7 ± 1.8 39.4 ± 12.9 698 ± 269 35.7 ± 12.8 74.6 ± 30.7 13.7 ± 9.9 0.273 ± 0.058
Rhein Emmerich 11/11 5.4 ± 2.3 44.7 ± 17.8 982 ± 302 50.2 ± 25.2 76.2 ± 28.2 35.8 ± 17.9 0.195 ± 0.059
Sieg 9/10 0.5 ± 0.3 6.3 ± 2.8 165 ± 60 3.4 ± 1.7 9.2 ± 4.0 13.4 ± 2.9 0.069 ± 0.021
Wupper 9/10 0.8 ± 0.3 14.7 ± 3.0 369 ± 88 18.5 ± 6.1 14.3 ± 3.4 30.6 ± 16.9 0.314 ± 0.131
Ruhr 8/9 2.2 ± 1.2 32.2 ± 16.6 800 ± 318 17.1 ± 6.5 23.1 ± 12.8 32.0 ± 14.3 0.077 ± 0.024
Erft 9/10 1.5 ± 0.8 14.5 ± 6.2 301 ± 93 11.6 ± 7.1 13.6 ± 6.6 14.6 ± 7.1 0.075 ± 0.070
Lippe 9/9 1.1 ± 0.5 25.2 ± 22.4 507 ± 544 19.3 ± 8.2 241.9 ± 143.7 15.6 ± 6.7 0.146 ± 0.061
Niers 5/5 2.2 ± 0.5 28.6 ± 6.0 643 ± 197 11.6 ± 2.2 14.1 ± 4.4 49.0 ± 12.5 0.080 ± 0.018
Schwalm 8/8 1.00 ± 0.4 12.3 ± 4.0 216 ± 75 8.8 ± 3.1 8.5 ± 2.5 16.9 ± 7.0 0.106 ± 0.039
Rur 10/10 2.1 ± 1.2 39.6 ± 26.4 1,630 ± 762 12.1 ± 4.8 53.4 ± 30.4 42.3 ± 32.5 0.124 ± 0.030
Berkel 7/8 1.2 ± 1.3 15.8 ± 10.2 357 ± 377 6.2 ± 4.3 20.8 ± 22.6 8.3 ± 3.0 0.145 ± 0.067
  1. aThe first figure represents the number of data for HCB and PFOS, and the second figure represents the number of data for PCDD/PCDFs, dl-PCBs, indicator PCBs, PBDEs and Hg.