Dissipation behavior of hexaconazole and kresoxim-methyl residues in ginseng and soil under field conditions

文献类型: 外文期刊

第一作者: Wang, Yan

作者: Wang, Yan;Liu, Chang;Gao, Jie;Wang, Chunwei;Cui, Lili;Li, Aijun

作者机构:

关键词: Dissipation behavior;Hexaconazole;Kresoxim-methyl;Ginseng soil;Residues

期刊名称:ENVIRONMENTAL MONITORING AND ASSESSMENT ( 影响因子:2.513; 五年影响因子:2.871 )

ISSN: 0167-6369

年卷期: 2015 年 187 卷 1 期

页码:

收录情况: SCI

摘要: The dissipation and terminal residues of a fungicide suspension (5 % hexaconazole, 25 % kresoxim-methyl) in ginseng and soil were investigated by high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). At fortified levels of 0.01, 0.02, and 0.20 mg kg(-1), the recoveries of hexaconazole and kresoxim-methyl were in the range of 80.6 similar to 94.8 % and 82.4 similar to 98.8 % with relative standard deviation of 3.42-9.12 % and 3.19-8.58 %, respectively. The half-lives were 7.09-10.73 days in root, 6.80-7.95 days in stem, 5.31-8.49 days in leaf, and 6.30-7.97 days in soil. The terminal residues were all below the maximum residue limits (MRLs) of EU and South Korea. Risk assessment results indicated that the risk of hexaconazole and kresoxim-methyl use in ginseng at dosage of 60-90 g a.i. ha(-1) was negligible to humans. This work would help the government to establish the MRL and provide guidance on the proper and safe use of hexaconazole and kresoxim-methyl in ginseng.

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