| 噻虫胺在番茄和土壤中的残留及消解动态 |
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| 引用本文： | 张鹏,金芬,杨莉莉,乌日娜,张艳欣,王静.噻虫胺在番茄和土壤中的残留及消解动态[J].农药学学报,2016,18(4):490-496. |
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| 作者姓名： | 张鹏 金芬 杨莉莉 乌日娜 张艳欣 王静 |
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| 作者单位： | 1.中国农业科学院 农业质量标准与检测技术研究所/农业部农产品质量安全重点实验室, 北京 100081 |
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| 基金项目： | 科技基础性工作专项（2013FY110100） |
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| 摘 要： | 通过两年3地的田间试验，采用分散固相萃取-液相色谱-串联质谱法，研究了50%噻虫胺水分散粒剂在番茄和土壤中的残留及消解动态。结果表明:在0.005、0.01和0.05 mg/kg添加水平下，噻虫胺在番茄中的回收率为90%～121%，相对标准偏差（RSD）为4.0%～4.5%（n=5），在土壤中的回收率为88%～92%，RSD为3.6%～5.8%（n=5），番茄和土壤中噻虫胺的定量限均为0.005 mg/kg，可满足现有限量标准的要求。噻虫胺在番茄中的消解动态符合准一级动力学方程，半衰期为3.5～17.3 d。当50%噻虫胺水分散粒剂以推荐剂量（有效成分）60 g/hm2在番茄生长到成熟个体一半大小时施药3次，施药间隔7 d时，噻虫胺在番茄上的最终残留量在< LOQ～0.32 mg/kg之间，远低于日本规定的最大允许残留量（MRL）值3 mg/kg，推荐采收安全间隔期为1 d。
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| 关 键 词： | 噻虫胺 番茄 土壤 残留 消解动态 分散固相萃取 |
| 收稿时间： | 2016/2/13 0:00:00 |
| 修稿时间： | 2016/4/19 0:00:00 |
Residue and dissipation of clothianidin in tomatoes and soil |
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| ZHANG Peng,JIN Fen,YANG Lili,WU Rin,ZHANG Yanxin and WANG Jing.Residue and dissipation of clothianidin in tomatoes and soil[J].Chinese Journal of Pesticide Science,2016,18(4):490-496. |
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| Authors: | ZHANG Peng JIN Fen YANG Lili WU Rin ZHANG Yanxin and WANG Jing |
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| Institution: | 1.Institute of Quality Standards and Testing Technology for Agro-products of CAAS/Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture, Beijing 100081, China |
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| Abstract: | A two-year field experiment was conducted to study the residue and dissipation dynamics of clothianidin (50% WDG) in tomatoes and soil in three locations. The dispersive solid phase extraction (DSPE) combined with high performance liquid chromatography-tandem mass spectrometry (HPLCMS/MS) method was developed for the rapid determination of the clothianidin residue in tomatoes and soil. The results indicated that the recoveries at spiked level of 0.005, 0.01 and 0.05 mg/kg in tomatoes were in the range of 90%-121%, with relative standard deviation of 4.0%-4.5% (n=5); and the recoveries for soil samples were in the range of 88%-92%, with relative standard deviation of 3.6% -5.8% (n=5). The limits of quantitation (LOQ) for clothianidin in tomatoes and soil were both 0.005 mg/kg, which could meet the requirement of max residue limits (MRLs) of clothianidin. The dissipation dynamics of clothianidin in tomatoes fitted the pseudo-first-order kinetics equations, and the half-lives of clothianidin were estimated to be 3.5-17.3 d in tomatoes. If tomatoes were treated three times and interval of 7 days with the available dosage of 60 g/hm2 during the growing season, the final residue of clothianidin is
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| Keywords: | clothianidin tomato soil residue dissipation dynamics dispersive solid phase extraction |
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