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Breakdown and extraction of phosphorus 32 labeled naled in milk

Breakdown and extraction of phosphorus 32 labeled naled in milk

Nahrung 24(8): 767-772

The organophosphorus insecticide naled [O,O-dimethyl-O,O-(1,2-dibromo-2,2-dichloroethyl)-phosphate, 32P-labeled] was degraded in milk in vitro at 5.degree. C with a half-life of 35 h with dichlorvos as a metabolite that also formed at short time heating and UV irradiation. The recovery in milk powder was 25% (naled + dichlorvos) of the initial concentration. Following spray application of 0.05 mg naled/kg body mass to 2 lactating cows, 5-8 ppb naled and 7-9 ppb dichlorvos were found in the milk at 5 h post-application, not exceeding the given tolerance level of 0.02 mg/kg in the German Democratic Republic.

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Accession: 004857933

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