Dissipation of pyraclostrobin and its metabolite BF-500-3 in maize under field conditions

文献类型: 外文期刊

第一作者: You, Xiangwei

作者: You, Xiangwei;Liu, Congyun;Liu, Fengmao;Liu, Yanping;Dong, Jiannan;Liu, Congyun;Liu, Yanping

作者机构:

关键词: pyraclostrobin;metabolite;HPLC-MS/MS;residue

期刊名称:ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY ( 影响因子:6.291; 五年影响因子:6.393 )

ISSN:

年卷期:

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收录情况: SCI

摘要: The dissipation and residue of pyraclostrobin and its metabolite BF-500-3 in maize under field conditions were investigated. A sensitive, simple and fast method for simultaneous determination of pyraclostrobin and BF-500-3 in maize matrix was established by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The average recoveries of pyraclostrobin and BF-500-3 were found in the range of 83.6-104.9% with relative standard deviations (RSDs) of 2.3-10.0%. The results showed that pyraclostrobin dissipated quickly in maize plant with half-lives of 1.6-1.7 days. Its metabolite BF-500-3 showed a tendency of rapid increasing initially and decreasing afterwards. At harvest time, the terminal residues of pyraclostrobin were below the maximum residue limit (MRL) set by USA and Canada in maize grain when measured 7 days after the final application, which suggested that the use of this fungicide was safe for humans. The results could provide guidance to safe and reasonable use of pyraclostrobin in agriculture.

分类号: X

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