9 
1 Abbreviations and explanations 
BaP 
Benzo [a] pyrene 
BfA-Fi 
Bundesforschungsanstalt für Fischerei, Federal Research Centre 
for Fisheries 
BSH 
Bundesamt für Seeschifffahrt und Hydrographie, Federal Maritime 
and Hydrographic Agency 
BLMP 
Bund/Lander-Messprogramm, Federal and State Monitoring 
Programme 
CH 4 
Methane 
CID 
Collision Induced Dissociation: A mass spectrometric techniques, 
where a molecular ion or a fragment ion is further fragmented by 
collision with e.g. Ar atoms to increase the selectivity of detection. 
cone. 
concentrated 
congener 
This expression means any single PCA compound with the same 
chain length but a variable number of chlorine atoms. 
D 
Replicate determination 
DBP 
Dichlorobenzophenone 
4,5-DCCD 
4,5 -Dichlorchlordene 
DCM or CH 2 C1 2 
Dichloromethane 
dw 
dry weight 
ECD 
Electron capture detector 
ECNI-MS 
Electron Capture Negative Ion Mass Spectrometry: A mass 
spectrometric technique, where electrons of thermal energy are 
generated in the ion source. These can only be captured by com 
pounds of high electron affinity such as polychlorinated pesticides. 
Since most matrix residues do not capture such thermal electron, 
background is suppressed and selectivity increased. 
El 
Electron Ionisation: The standard ionsation technique in mass 
spectrometry, where compounds are ionised with electrons of high 
energy (normally 70 eV) 
EPA 
U. S. Environmental Protection Agency 
ESI 
Electro Spray Ionisation 
EU 
European Union 
f 
Female