简介:2.1 Test kits are commercially available for this method. The manufacturer's directions
should be followed.
2.2 In general, the method is performed using an extract of a soil sample. Filtered extracts
may be stored co简介:2.1 Test kits are commercially available for this method. The manufacturer's directions
should be followed.
2.2 In general, the method is performed using an extract of a soil sample. Filtered extracts
may be stored cold, in the dark. An aliquot of the extract and an enzyme-DDT conjugate reagent are
added to immobilized DDT antibody. The enzyme-DDT conjugate "competes" with DDT present in
the sample for binding to DDT antibody. The enzyme-DDT conjugate bound to the DDT antibody
then catalyzes a colorless substrate to a colored product. The test is interpreted by comparing the
color produced by a sample to the response produced by a reference reaction.详细>