Photodecomposition experiment were carried out in 18 days. It demonstrated polyketone was photodegradable by UV-irradiation, as far as molecular weight was concerned, its UV-photodecomposition half-time was 5days and it dropped from 26352 to 7892 in 18 days.

聚酮光降解实验表明，聚酮产品经过紫外灯直射，分子量减半对应的半衰期为5天，经过18天后，分子量从26352降为7892，下降了70％。

Based on a series of field experiments a set of application criteria in terms of potato plant were recommended for 50% fentin hydroxide SC. Photodecomposition is one of the important degradation pathways of pesticides occurring in the potato environment.

由于光致降解是三苯基氢氧化锡在马铃薯地使用后的主要降解途径之一,它不仅直接影响着农药的药效、农药在环境中的消失动态,而且其某些光解产物对生态环境又可产生潜在毒性的危害。