Department of Environmental Science and Engineering, Shanghai Jiaotong University, No. 800 Dongchuang Road, Shanghai, China.
Bull Environ Contam Toxicol. 2010 Mar;84(3):289-93. doi: 10.1007/s00128-010-9941-z. Epub 2010 Jan 29.
The HPLC method for determination of imidaclothiz residue in cabbage and soil was developed, and its degradation and final residue were studied. The mean accuracies of the analytical method were 92.0-93.0% in soil and 88-93% in cabbage. The precision in cabbage ranged from 2.2% to 5.6%, and in soil from 2.0% to 5.0%. The minimum detectable amount of imidacothiz was 1 x 10(-10)g. The minimum detectable concentration was 0.0075 mg kg(-1) in cabbage and 0.003 mg kg(-1) in soil. The results showed that imidaclothiz degradation in soil and cabbage coincided with C = 0.0427e(-0.0923t), C = 0.739e(-0.279t). The half-lives were about 3.1 days in soil and 2.2 days in cabbage.
建立了测定甘蓝和土壤中咪鲜胺残留量的高效液相色谱分析方法, 并对其消解动态和最终残留进行了研究。方法在土壤和甘蓝中的平均回收率为 92.0%～93.0%, 变异系数为 2.2%～5.6%; 在土壤和甘蓝中的最低检出浓度分别为 0.003 和 0.0075mg·kg-1, 最低检出量分别为 1×10-10g。结果表明, 咪鲜胺在土壤和甘蓝中的消解动态符合一级动力学方程 C = 0.0427e(-0.0923t), C = 0.739e(-0.279t), 在土壤和甘蓝中的半衰期分别为 3.1d 和 2.2d。
