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Analytical procedure for sediment samples 
The optimised method for the analysis of sediment samples consists of microwave 
assisted extraction (MAE) and a silica gel clean-up as described in Appendix 6.6.4. The 
scheme in Figure 31 summarises the procedure. 
Figure 31: Overall scheme for the analysis of sediments for chlorpyrifos, endosulfan, and trifluralin