Piperophos에 대한 광분해 실험을 수행하여 속도상수와 분해생성물을 측정하였다. 햇빛을 이용한 광분해 실험은 2003년 10월 3일부터 10월 22일 까지 하였으며 상당기간 동안 농약이 햇빛에 안정함을 확인할 수 있었고, humic acid 의 광관여 효과가 없음을 알 수 있었다. 자외선을 이용한 광분해 실험에서 piperophos는 자외선을 단독조사하였을 때 자외선의 세기가 클수록 상대적으로 빠르게 분해되었으며, 광분해 촉매제인 TiO₂의 양을 증가시켜도 별 차이가 없었다. 광분해에 의한 분해산물을 확인하고자 GC/MS분석을 한 결과 piperophos의 분해생성물은 m/z=166의 0.0-dipropyl phosphorodithioate로 추정된다.

The present study was perfomied 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.

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