Tissues from beagle dogs fed Terraclor in foodThe presence of PCA and methyl pentachloro-(PCNB, daily for up to two years) were analyzed by phenyl sulfide has been established by infrared and gas chromatography for residual PCNB, impurities, mass spectroscopy. Chromatographic analyses of and metabolites. The data obtained are indicative extracts of rat tissues from rats fed PCNB and from that PCNB is not present in fat or tissue and the plants grown in PCNB treated soil are indicative of metabolic products of PCNB are pentachloroa n identical metabolism. aniline (PCA) and methyl pentachlorophenyl sulfide. erraclor, or pentachloronitrobenzene (PCNB), manufactured and sold by Olin Mathieson Chemical Corpo-T ration as a soil fungicide, was incorporated in animal food and fed daily to beagle dogs and rats in a two-year chronic test conducted at the Medical College of Virginia.The animal tissues. as well as the excretion products, were anal) zed b> gas chromatography employing electron capture detection for PCNB, impurities such as hexachlorobenzene (HCB), pentachlorobenzene (PCB), and metabolites of PCNB.The metabolism products of PCNB in plants were followed b). anal).zing young plants grown in soil treated with PCNB. EYPERIXIENTAL
Colorimetric Estimation of Malathion Residues in Animal ProductsA colorimetric method for the estimation of spray residues of malathion on plant material has been adapted to the analysis of animal products. This has led to a more detailed study of the basic procedure, and a number of improvements and modifications have been made. Methods for the determination of residues in meat, fat, liver, milk, and eggs are presented.(2) Conrov, H. W., J. Assoc. Offic. Agr.Chemists 40, 230-5 (1956).
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