以微萃取瓶富集-高效液相色谱法为检测手段,考察了水中灭草隆、绿谷隆、溴谷隆和敌草隆在紫外光和太阳光照射下的光降解情况.研究了光照时间、初始浓度、光照距离等条件对4组分降解率的影响.结果表明:在254 nm紫外光照射下,4组分的降解速率:溴谷隆＞绿谷隆＞灭草隆＞敌草隆,30 min内光降解率均能达到80％以上;而太阳光自然照射4组分几乎不被降解.
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