Dissipation of four fungicides on greenhouse strawberries and an assessment of their risks

文献类型： 外文期刊

第一作者： Wang, Zhiwei

作者： Wang, Zhiwei;Cang, Tao;Qi, Peipei;Zhao, Xuepin;Xu, Hao;Wang, Xiangyun;Zhang, Hu;Wang, Xinquan

作者机构：

关键词： Acceptable daily intake;Fungicide;Greenhouse;Residue;Risk assessment;Strawberry

期刊名称：FOOD CONTROL （ 影响因子：5.548； 五年影响因子：5.498 ）

ISSN：

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收录情况： SCI

摘要： Risk assessments of the fungicides pyraclostrobin, iprodione, tebuconazole and cyprodinil were carried after determining their persistence on strawberries following two applications by spraying in a greenhouse. The Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) method was used for sample preparation, and high-performance liquid chromatography-tandem mass spectrometry and gas chromatography-tandem mass spectrometry were used for sample analysis. The range for the average recoveries of the four fungicides was 86.2-105.4%, and the relative standard deviation range was 2.7-6.1 %. The half-lives of pyraclostrobin, iprodione, tebuconazole and cyprodinil after a single application were 3.7, 3.6, 3.3 and 2.8 d, respectively. Compared with a single application, a second application of the fungicides increased the average concentrations of residues left on the strawberries. Risk assessments of the four fungicides were conducted by comparing national estimated daily intakes against acceptable daily intakes under good agricultural practice conditions. With application at the recommended dosage, strawberries sprayed with pyraclostrobin, iprodione and tebuconazole were safe for consumption after two applications. By contrast, while the first application of cyprodinil was safe, the second presented a high health risk. Even at the recommended dosage (720 a. i. g ha-1), repeat applications of cyprodinil should be banned. (C) 2015 Elsevier Ltd. All rights reserved.

分类号： TS2

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