College of Science, China Agricultural University, Beijing 100193, PR China.
Ecotoxicol Environ Saf. 2010 Feb;73(2):183-8. doi: 10.1016/j.ecoenv.2009.08.003.
The residue levels and dissipation rate of famoxadone in watermelon and soil were determined by HPLC-UVD. The LODs for famoxadone in watermelon, peel, flesh and soil were 0.002mg/kg (0.004mg/kg in leaf). The fortified recoveries ranged from 84.91% to 99.41% with relative standard deviations (RSDs) of 0.06-4.50%. The dissipation of famoxadone residue over the time in watermelon leaf and soil fitted to the equation C(T)=19.695e(-0.078T) and C(T)=1.369e(-0.129T). The half-lives (T(1/2)) of famoxadone in watermelon leaf and soil were 9.7 and 5.5 days, respectively. The final residue in watermelon was lower than 0.1mg/kg at harvest, which suggested the use of this fungicide to be safe to both human and environment. This work would be helpful in establishing the maximum residue limit (MRL) for famoxadone in watermelon in China, and provide guidance to the proper and safe use of this pesticide in agriculture.
采用高效液相色谱-紫外检测法（HPLC-UVD）测定了在西瓜和土壤中肟菌·戊唑醇的残留水平和消解动态。肟菌·戊唑醇在西瓜、果皮、果肉和土壤中的检测限（LODs）分别为 0.002mg/kg（叶片中的 LODs 为 0.004mg/kg）。添加回收率在 84.91%至 99.41%之间，相对标准偏差（RSDs）为 0.06-4.50%。肟菌·戊唑醇在西瓜叶片和土壤中的消解随时间符合方程 C(T)=19.695e(-0.078T)和 C(T)=1.369e(-0.129T)。肟菌·戊唑醇在西瓜叶片和土壤中的半衰期（T(1/2)）分别为 9.7 天和 5.5 天。收获时西瓜中的最终残留量低于 0.1mg/kg，这表明该杀菌剂对人类和环境都是安全的。本研究有助于在中国制定西瓜中肟菌·戊唑醇的最大残留限量（MRL），并为该农药在农业中的合理安全使用提供指导。
