Determination of quintrione in rice, rice husk and rice straw and exploration of its dissipation from rice straw

文献类型： 外文期刊

第一作者： Zhang, Ying

作者： Zhang, Ying;Zhou, Yong;Li, Xiaogang;Zhang, Ying;Duan, Tingting;Zhou, Yong

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关键词： Quintrione; residue; UHPLC-MS; MS; rice paddy field; dissipation rate

期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES （ 影响因子：1.697； 五年影响因子：1.6 ）

ISSN： 0360-1234

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收录情况： SCI

摘要： A rapid and sensitive method for the identification and quantification of quintrione residue in brown rice, rice husk, and rice straw matrices was developed and validated. Samples were extracted with acetonitrile, purified with octadecylsilane (C18) and graphitized carbon black (GCB) sorbents, and quantified using ultrahigh-performance liquid chromatography coupled with tandem mass spectrometry (UHPLC-MS/MS). The developed method exhibited excellent linearity (R-2 >= 0.9988), and the limit of quantitation was 2 mu g/kg in all matrices. The method also had outstanding trueness and recoveries (90.5-111.1%) at four spiked levels (2, 20, 200, and 2000 mu g/kg) with intraday and interday precisions of 0.7-6.5% and 5.2-11.8%, respectively, in the three matrices. The applicability of the method was tested by determining the dissipation rate of quintrione in rice straw under field conditions, and the measured data fit the Hockey stick kinetic model with R-2 values of 0.9349-0.9983. The half-lives of quintrione in rice straw ranged from 2.7 to 16.5 days. The results indicate that the method is effective and reliable for the detection of quintrione residue in rice paddy fields, and the dissipation data provide guidance for the safe application of quintrione.

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