Dissipation and residue of flonicamid in cucumber, apple and soil under field conditions

文献类型: 外文期刊

第一作者: Liu, Xingang

作者: Liu, Xingang;Zhu, Yulong;Dong, Fengshou;Xu, Jun;Zheng, Yongquan

作者机构:

关键词: apple;dissipation;cucumber;field treatment;flonicamid;residue;soil

期刊名称:INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY ( 影响因子:2.826; 五年影响因子:2.215 )

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收录情况: SCI

摘要: A method based on QuEChERS-like extraction and UPLC-ESI-MS/MS for the analysis of flonicamid was established. The samples were extracted by acetonitrile-methanol mixture and were purified using PSA. At fortification levels of 0.01, 0.1 and 0.5 mg/kg in cucumber, apple and soil, recoveries ranged from 71.5 to 106.0% with relative standard deviation (RSD) of 2.6-9.9%. The limit of quantification (LOQ) was 0.003 mg/kg for cucumber, apple and soil. This study also investigates the dissipation of flonicamid in cucumber, apple and soil. The dissipation half-lives of flonicamid in cucumber, apple and soil were 3.0-4.9 days, 5.1-6.1 days and 10.3-14.2 days, respectively. The final residues of flonicamid ranged from 0.029 to 0.295 mg/kg in cucumbers, <0.01-0.174 mg/kg in apples and <0.01-0.172 mg/kg in soil, respectively. The observed low residual levels of flonicamid suggest that the cucumber and apple are safe when applied at the recommended dosage.

分类号: X

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