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Chlorpyrifos concentration in SR-dosed medium expressed as ng/L polyacrylate in SPME fibers exposed for 7 days to this medium plotted against the chlorpyrifos concentration in 28 days old spiked sediment expressed as ng/L polyacrylate in SPME fibers exposed for 7 days to this sediment. The dashed line represents the 1:1 line, while the dotted lines include the 1:3 to the 3:1 area.
