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A 250 g soil sample containing DDT is extracted by mixing it with 250mL of water and 100 mL of methylene chloride. The partition coefficient
A 250 g soil sample containing DDT is extracted by mixing it with 250mL of water and 100 mL of methylene chloride. The partition coefficient for the extraction is 0.8. (80% recovery) 10.0 mL of methylene chloride is removed from the separation funnel and evaporated to dryness under a stream of nitrogen. 100 uL of acetone is added to the vial and 1.00 uL is injected into a gas chromatograph. The peak area produced is 155 mV s. A standard containing 10.0 ug/mL DDT gives a peak area of 240 mVs. What is the weight percent of DDT in the soil?
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