243 
Figure 1 : Research vessel "Gauss" 40 
Figure 2: Water sampling stations in July/Aug. 2003 (Ga 405) 41 
Figure 3: Water sampling stations in the German Bight in 2004 and 2005 42 
Figure 4: Sediment sampling stations in the German Bight and western Baltic Sea as well as water 
sampling stations in the Baltic Sea. Figures in bold assign the TOC content [mg/g], those in 
italic station names 42 
Figure 5: Top: Locations of North Sea biota sampling areas of the Institute of Fishery Ecology. Bottom: 
Sampling area in the Baltic Sea 47 
Figure 6: Structure of some important chlordane compounds and the main metabolites oxychlordane, cis- 
and frans-heptachlorepoxide 58 
Figure 7: Dependence of the total response factor (ECNI) on the degree of chlorination for seven different 
sPCA mixtures (A, average of five interday measurements) and nine different MCCP mixtures 
(B: average of three interday measurements). Error bars indicate standard deviations of the 
determination of the chlorine content in x and of the response factor in y 68 
Figure 8: Linear range of ECNI for the sPCA congener group Ci3Cl 6 H 2 2 from a sPCA mixture with 
55.5 % chlorine content. Linearity could be obtained within 1-100 ng/Ltl. The most abundant 
isotope signal of the [M-HCl]"ion was recorded 74 
Figure 9: ECNI-determination of formula and congener group profiles of selected PC A mixtures of 
different chlorine contents. CI3.4 compounds were not detectable. The trade name or the chlorine 
content of the mixtures are given for each bar graph 83 
Figure 10: CH4/CH2CI2-NICI determination of the formula group patterns of a sPCA mixture (55.5 % 
chlorine content, A) and of two North Sea dab liver extracts (B, North Sea 54° 15,64 N, 7° 
29,79’ E, not studied further, C; site NS1, see Table 24). compounds are clearly visible..84 
Figure 11: CH4/CH2CI2-NICI determination of the formula group patterns C14-C17 of three mPCA 
mixtures with differing chlorine content (42, 52 and 57 %). No C^compounds were present. 85 
Figure 12: Left: Map of the capture locations in the North Sea (for detailed information see Table 25) and 
sPCA and mPCA concentrations (ng/g lipid weight) determined in samples NS 1-5 from 2002 
(see Table 26). Right: Map of the capture locations in the North Sea (for detailed information 
see Table 18) and sPCA and mPCA concentrations (ng/g lipid weight) determined in samples 
NS6-7 from 2003 (see Table 26) 92 
Figure 13: Map of the capture locations in the Baltic Sea (for detailed information see Table 25) and 
sPCA and mPCA concentrations (ng/g lipid weight) for 2002 and 2003 (see Table 26) 93 
Figure 14: 93 
Figure 15: Formula group patterns of sPCAs (C10-C13) in selected samples from the Lofot Island (Al), the 
Baltic Sea (OS1, OS3, OS4) and the North Sea (NS1-NS3). The patterns for mPCAs (C14-C15) 
are quite similar and are therefore only shown for the selected samples to the left. Two standard 
mixtures are shown for comparison (sPCA: C10-C13, 55.5 % chlorine content, mPCA: C14-C17, 
52 % chlorine content). Determination was carried out by ECNI 97 
Figure 16: Comparison of the averaged C-chain patterns in cod from the Baltic Sea with five technical 
sPCA mixtures. The bars mark the standard deviations 98 
Figure 17: Comparison of the averaged C-chain patterns of sPCA in selected cod samples from the 
northern North Atlantic 99 
Figure 18: Map of capture locations in the North Sea (for detailed information see Table 25) and sum 
concentrations of chlordane compounds (cis/trans-nonachlor, cts/frans-chlordane and 
oxychlordane) in fish liver in ng/g lipid weight (see Table 30) 104 
Figure 19: Map of capture locations in the Baltic Sea (for detailed information see Table 25) and sum 
concentrations of chlordane compounds («Virans-nonachlor, cts/frans-chlordane and 
oxychlordane) in fish liver in ng/g lipid weight (see Table 30) 105 
Figure 20: -specific survey of total PCA [ng/g] concentrations in sediments from the North and Baltic Sea 
(2001-2004). Quantification was carried out by EI-MS/MS (see Table 34 for details) 113 
Figure 21: Survey over site-specific sPCA and mPCA (C1445) concentrations in sediments from the North 
and Baltic Sea in 2001-2004 obtained by CH4/CH2CI2-NICI-MS 113