7 
5.6.5 Quantification of PCAs by ECNI-LRMS 134 
5.6.6 Quantification of PCAs by ECNI-HRMS 137 
5.6.7 Group pattern determination of PCAs by CH4/CH2CI2-NICI 138 
5.6.8 Quantification of PCAs by EI-MS/MS 139 
5.6.9 Quantification of chlordanes by ECNI-LRMS 140 
5.6.10 Quantification of chlordanes by EI-MS/MS 142 
5.7 Appendix 2: Average molar mass and Cl content of sample PCAs 144 
5.8 Appendix 3: Overview analysed samples and applied techniques 145 
5.9 Appendix 4: Publications and conference contributions 148 
6 Project 2: Identification of Organic Compounds in the North and Baltic Seas 151 
6.1 Aim of the Project 151 
6.2 Survey of Properties of the Target Compounds 152 
6.2.1 Chlorpyrifos-ethyl and -methyl 152 
6.2.2 Dicofol 155 
6.2.3 Endosulfan I and II 158 
6.2.4 Pentachlorophenol 160 
6.2.5 Trifluralin 162 
6.3 Applied Methodology 164 
6.3.1 State of the art of analysis 164 
6.3.2 Method development 165 
6.3.2.1 Methods for Chlorpyrifos, Endosulfan and Trifluralin 166 
6.3.2.2 Methods for Dicofol 170 
6.3.2.3 Methods for Pentachlorophenol and Trichloropyridinol 171 
6.3.3 Method validation and quality control 172 
6.3.3.1 Linearity 172 
6.3.3.2 Blank values 175 
6.3.3.3 Recoveries 176 
6.3.3.4 Limits of quantification 179 
6.3.3.5 Laboratory Performance Study 180 
6.4 Results and Discussion 180 
6.4.1 Chlorpyrifos 180 
6.4.1.1 Water 181 
6.4.1.2 Sediment 183 
6.4.1.3 Biota 185 
6.4.1.4 Discussion 187 
6.4.2 Trichloropyridinol (TCPy) 190 
6.4.2.1 Water 190 
6.4.2.2 Discussion 190 
6.4.3 Endosulfan 190 
6.4.3.1 Water 191 
6.4.3.2 Sediment 193 
6.4.3.3 Biota 195 
6.4.3.4 Discussion 196 
6.4.4 Trifluralin 199