85 
5.4.1.2 mPCA mixtures 
mPCA-mixtures were dominated by C 14-compounds. All other carbon chain lengths 
were of minor importance as Figure 6 shows. 
HCl 5 [JC16 DC17 BC18 DC'19 
Number of carbon atoms 
Figure 11: CH4/CH2CI2-NICI determination of the formula group patterns C14-Q7 of three mPCA 
mixtures with differing chlorine content (42, 52 and 57 %). No CAjCompou nds were present. 
5.4.2 PCA and chlordanes in biota 
5.4.2.1 Origin and characterisation of samples 
The origin and characterisation of the samples are summarised in Table 25. Sampling 
and sample selection was carried out as follows: