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Dissipation and Residues of Dichlorprop-P and Bentazone in Wheat-Field Ecosystem

文献类型： 外文期刊

作者： Feng, Xiaoxiao 1 ; Yu, Jianlei 2 ; Pan, Lixiang 1 ; Song, Guochun 2 ; Zhang, Hongyan 1 ;

作者机构： 1.China Agr Univ, Coll Sci, Beijing 100193, Peoples R China

2.Shandong Acad Agr Sci, Inst Plant Protect, Jinan 250100, Peoples R China

关键词： dichlorprop-P;bentazone;dissipation;residue;wheat

期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH （ 影响因子：3.39； 五年影响因子：3.789 ）

ISSN： 1660-4601

年卷期： 2016 年 13 卷 6 期

页码：

收录情况： SCI

摘要： Dichlorprop-P and bentazone have been widely used in the prevention and control of weeds in wheat field ecosystems. There is a concern that pesticide residues and metabolites remain on or in the wheat. Thus, the study of the determination and monitoring of their residues in wheat has important significance. A rapid, simple and reliable QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method was modified, developed and validated for the determination of dichlorprop-P, bentazone and its metabolites (6-hydroxy-bentazone and 8-hydroxy-bentazone) in wheat (wheat plants, wheat straw and grains of wheat) using high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). The average recoveries of this method ranged from 72.9% to 108.7%, and the limits of quantification (LOQs) were 2.5-12 mu g/kg. The dissipation and final residue of four compounds in three provinces (Shandong, Jiangsu and Heilongjiang) in China were studied. The trial results showed that the half-lives of dichlorprop-P and bentazone were 1.9-2.5 days and 0.5-2.4 days in wheat plants, respectively. The terminal residues in grains of wheat and wheat straw at harvest were all much below the maximum residue limit (MRL) of 0.2 mg/kg for dichlorprop-P and 0.1 mg/kg for bentazone established by the European Union (EU, Regulation No. 396/2005).

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