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采用高效液相色谱法 ,系统地测定了毒死蜱在水稻体内外的消减动态。根据处理后不同时间体内外的药量 ,确定其渗透的性能和速率。结果表明 :毒死蜱能够迅速渗透到水稻体内 ,处理后 1～ 4小时 ,渗透剂量占总药量的 1 0 .4%～ 2 4 .8% ;处理后 4小时 ,渗透量达最大值 ,而 6天后含量降到最低点 ,分别占其总药量的 2 4 .8%和 6.8% ,说明毒死蜱能有效防治一些钻蛀性害虫是由于具有一定的渗透性能 ;在体外 ,毒死蜱持留量与时间呈反相关 ,持留量随时间而逐渐迅速降低 ,消减中时约为 1 6小时 ;试验期间进入水稻体内的毒死蜱含量较均匀而稳定。
The reduction kinetics of chlorpyrifos in rice and in vitro was determined systematically by high performance liquid chromatography (HPLC). According to the different time after treatment, the amount of drug in vivo and in vitro, to determine the performance and rate of infiltration. The results showed that the chlorpyrifos could rapidly penetrate into the rice body, the permeation dose accounted for 10.4% -2.28% of the total dose within 1 to 4 hours after the treatment, and reached the maximum value at 4 hours after the treatment, while 6 Days after the content dropped to the lowest point, respectively, accounting for 24.8% and 6.8% of its total dose, indicating that chlorpyrifos can effectively prevent some of the boring pests due to a certain permeability; in vitro, the chlorpyrifos retention and time was Anti-correlation, the amount of retention gradually decreased over time, abatement time of about 16 hours; during the test into the body of the content of chlorpyrifos more uniform and stable.