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Photodegradation and Degradation Product of Piperophos  

민경진 (계명대학교 자연과학대학 공중보건학과)
Publication Information
Journal of Food Hygiene and Safety / v.19, no.2, 2004 , pp. 97-103 More about this Journal
Abstract
The present study was performed to investigate photodegradation rate constants and degradation products of piperophos by the USEPA method. The pesticide was very stable in 16 days exposure of sunlight from October 3 to 22, 2003 and humic acid had no sensitizing effect on the photolysis of each pesticide in sunlight. In the UV irradiation test, piperophos was rapidly degraded as increasing UV intensity. In case of UV irradiation with TiO$_2$ and with TiO$_2$ powder amount, degradation of piperophos was slower than UV irradiation. In order to identify photolysis product, the extracts of degradation product was analyzed by GC/MS. The mass spectrum of photolysis product of piperophos was at m/z 166. It was suggested that the photolysis products of piperophos was O, O-dipropyl phosphorodithioate.
Keywords
Photolysis; Piperophos;
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