Dissipation pattern and residual levels of boscalid in cucumber and soil using liquid chromatography-tandem mass spectrometry

文献类型： 外文期刊

第一作者： He, Yahui

作者： He, Yahui;Yohannes, Woldemariam Kalekristos;Khan, Majid;Meng, Man;Wang, Mengqiang;She, Yongxin;Abd EI-Aty, A. M.;Abd EI-Aty, A. M.;Hacimuftuoglu, Fazil;He, Yongjuan;Gao, Liping

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关键词： Boscalid; residue; cucumber; soil; HPLC-MS; MS; degradation kinetics

期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES （ 影响因子：1.99； 五年影响因子：2.116 ）

ISSN： 0360-1234

年卷期： 2020 年 55 卷 4 期

页码：

收录情况： SCI

摘要： To stipulate the rationale of spraying doses and to determine the safe interval period of boscalid suspension concentrate (SC), the degradation dynamics and residual levels were investigated in cucumber and soil using liquid chromatography-tandem mass spectrometry (LC-MS/MS). Field trials were conducted according to Chinese Guideline on pesticide residue trials. Following application, the degradation kinetics was best ascribed to first-order kinetic models with half-life of 2.67-9.90 d in cucumber. Spraying boscalid SC at 1.5-fold the recommended dosage yield terminal residues, which are clearly lower than the maximum residue limit (MRL) established by China (MRL =5 mg.kg(-1)) in cucumber. At variance, the dissipation dynamics in soil did not fit to first-order kinetics and the half-life was more than 17 days, the finding which denotes that the degradation behavior of boscalid in soil proceeds slowly. It has therefore been shown that boscalid is safe for use on cucumbers under the recommended dosage.

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