Dissipation and Residue Level of Thifluzamide in Rice Field Ecosystem

文献类型： 外文期刊

第一作者： Chen, Weitao

作者： Chen, Weitao;Wu, Xuemin;Han, Lijun;Li, Minghui;Li, Wenxi

作者机构：

期刊名称：JOURNAL OF CHEMISTRY （ 影响因子：2.506； 五年影响因子：2.726 ）

ISSN： 2090-9063

年卷期： 2015 年

页码：

收录情况： SCI

摘要： An efficient modified QuEChERS method combined with high performance liquid chromatography-tandem mass spectrometry detection (HPLC-MS/MS) was established and evaluated for the residue analysis of thifluzamide in rice grain, husk, straw, seedling, paddy water, and soil. Thifluzamide residues were extracted with acetonitrile, cleaned up with primary secondary amine (PSA), and then determined by HPLC-MS/MS. The fortified recoveries were 76%-106% with RSDs of 3%-13%. The results of the supervised field trials at two experiment sites showed that thifluzamide dissipated rapidly in paddy fields, and the half-lives in paddy water, soil, and rice seedling were 0.3-0.6 d, 1.8-3.6 d, and 4.3-13.9 d, respectively. At harvest time, when the preharvest interval (PHI) was set as 21 d, the final residues of thifluzamide in rice grains were below the maximum residue limit (MRL) of 0.5 mg/kg set by Japan, whereas the final residues in rice husk and straw were still high (the highest value reached 1.36 mg/kg in rice husk and 0.83 mg/kg in rice straw). The results indicated that the highest residue in rice grain was 0.23 mg/kg when PHI was 21 d, and only 6.9-11.0% of acute risk quotient of thifluzamide was occupied by the dietary daily intake in Chinese population consuming rice.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序