毒死蜱在蔬菜中的消解动态研究

Degradation Dynamic of Chlorpyrifos in Vegetables

采用对田间植株直接施药、定期采样提取、高效液相色谱仪检测的方法,以毒死蜱杀虫剂为材料,对生菜和彩椒两种蔬菜中农药的残留消除动态进行探究。结果表明:在1.6 mg/kg和3.2 mg/kg施药剂量下,毒死蜱在生菜和彩椒中的消解半衰期分别为2.05~2.16 d、1.49~2.23 d,半衰期均小于3 d。

The degradation dynamic and removal methods of chlorpyrifos in vegetables were investigated using high performance liquid chromatography （HPLC）. Lettuce and bell peppers were selected as representative vegeta- bles. Results showed that the biological half-live of chlorpyrifos were about 2.05-2.16 days and 1.49-2.23 days at the application rates of 1.6 and 3.2 mg/kg in lettuce and bell pepper respectively, they were all less than 3 days.