Sandimirov S. Screening studies of POP levels in fish from selected lakes in the Paz watercourse / In State of the environment in the Norwegian, Finnish and Russian border area. The Finnish Environment. Finland, Jyvaskyla: Kopijyva Oy. 2007, №6.

Screening studies o f POPs in fish from the Paz watercourse Tabel 2 continues. OCs Whitefish, female Whitefish, male Pike, M&F N=13 N=6 N=9 N=10 N=6 N==5 Wt=100-200g Wt=300-400 g Wt=400-500g Wt=100-200g Wt=200-300g Muscle Liver Muscle Liver Muscle Liver Muscle Liver Muscle Liver Muscle Liver Lipid, % 0.71 3.05 0.50 3.60 0.76 8.40 0.44 3.06 0.55 3.17 0.32 6.86 1EDDT 0.35 1.87 0.2 1.1 n.d. 0.60 0.41 3.87 0.55 2.08 0.24 5.87 Hexachlorobenzene 0.27 1.39 0.2 1.3 0.16 0.2 0.28 2.19 0.22 1.11 0.18 2.07 2Chlordanes (ECHL) 0.10 2.71 n.d. 4.90 0 0.11 0.23 6.88 0.82 3.95 0.60 3.94 3EHCH n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. 4EPCB 2.58 23.2 2.82 8.13 1.53 7.33 2.45 32.3 7.88 33.8 5.61 25.3 5Toxaphene 6.37 10.2 1.1 3.8 1.22 4.3 7.97 22.9 5.16 1.04 5.26 2.06 EPCDD/F 1.26 n.d 1.49 n.d n.d n.d n.d n.d n.d n.d 1.33 n.d 7EPAH 14.6 50.9 n.d n.d n.d n.d 0.25 46.2 n.d 69.9 22.0 50.3 1EDDT is sumof o,p'-DDE, p,p'-DDE, o,p-DDD, p,p-DDD, o,p'-DDT and p,p'-DDT; 2ECHL is sum of heptachlor, heptachlor epoxide, oxychlordane, trans-chlordane, cis-chlordane, trans-nonachlor and cis-nonachlor; 3EHCH is sumof a-HCH, P-HCH, and y-HCH 4EPCB is sumof 53 PCB congeners 5Toxaphene compounds Parlar-26, Parlar-50, Parlar-62 6EPBDE is sumof congener; 28, 47, 99, 100. 153. 154 and 183 7EPAH is sumof 40 individual polycyclic aromatic hydrocarbons n.d.=not detected 4.2. Contaminant analyses Analyses were carried out at Typhoon analytical laboratory (Obninsk, Russia). Detailed descriptions of analytical methods used for determination of environmental contaminants, along with information on QC/QA, are given in Appendix 1. The following persistent pollutants were determined in the biological samples: - chlorinated pesticides and industrial organochlorines: DDT-group (o,p - an d p ,p ’-DDE, o,p - and p , p ’-DDD, o,p - and p , p ’-DDT), HCH (a-, P- and y- isomers of HCH), Hexachlorobenzene (HCB), chlordanes (Heptachlor, Heptachlor epoxide, Oxychlordane, trans- and cis-Nonachlors, , trans- and cis-Chlordanes), mirex, endrin and dieldrin; - ortho-substituted congeners of polychlorinated biphenyls; - planar and non-ortho-substituted congeners of PCBs (IUPAC): # 77, 81, 105, 114, 118, 123, 126, 156, 157, 167, 169, 189, as well as PCB congeners # 170 and 180; - toxaphene compounds Parlar-26, Parlar-50, Parlar-62; - brominated flame-retardants 2,4,4'-TrBDE (#28); 2,2',4,4'-TeBDE (#47); 2,2',4,4',5- PBDE (#99); 2,2',4,4',6-PBDE (#100); 2,2’,4,4’,5,5’- HeBDE (#153); 2,2’,4,4’,5,6- HeBDE (#154); 2,2’,3,4,4’,5,6-HpBDE (#183); - polychlorinated dibenzo-p-dioxines and dibenzofurans (PCDD/PCDF); - 40 individual polycyclic aromatic hydrocarbons (PAHs), included alkyl-homologues and 16 PAHs recommended by EPA Samples were analyzed in two analytical batches, which included laboratory procedural blank, spiked blank sample for biological samples. To control recovery of analytes, surrogate isotope- labelled substances were used. They were introduced into the samples before extraction. Extracts were analyzed using GC/MS. The Typhoon laboratory has national accreditation Akvaplan-niva report APN 514-3365.02 8