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HPLC-MS method for water samples 
The principles of the analytical procedure for sea water samples are summarised in 
Figure 33; experimental details are provided in the Annex (6.6.6). 
Figure 33: Overall scheme for the analysis of sea water for PCP and TCPy 
6.3.3 Method validation and quality control 
6.3.3.1 Linearity 
Figure 34 shows the calibration curves for the GC-NCI-MS analysis of chlorpyrifos, 
endosulfan, and trifluralin. They all show good linearity in the low concentration range, 
which applies to nearly all marine samples of this study.