Analytical Methods for Pesticides and Plant Growth Regulators
PESTAB. Two methods have been recommended for the residue analysis of aramite. The first, which involves partial cleanup by shaking with charcoal-attaclay followed by microcoulometric detection, can be used to determine aramite residues down to less than 1 ppm. Analysis is carried out using gas chromatography with a 5% DC-200 silicone oil column at 200DEG C; with this procedure, aramite can be distinguished from OW-9. The second method can be used to determine aramite in the presence of DDT, toxaphene, and endrin in crop residues. The pesticides are extracted with benzene, separated and cleaned up on a Florisil column, and determined by gas chromatography on a column coated with a DC-710-30 mixed phase. With this method, a linear response is obtained in the range 40-160 ng aramite. The sensitivity of the method is 0.05 ppm, with a mean precision of 4% and a mean accuracy of 96%./SECRETION
