文献类型： 外文期刊

作者： Zhang, Zihao ¹ ; Li, Minghui ¹ ; Feng, Mengyuan ¹ ; Zhu, Kechen ¹ ; Han, Lijun ¹ ;

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

2.Xinjiang Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Xinjiang 830091, Peoples R China

关键词： Cloransulam-methyl;QuEChERS;Soybean;Soil;Dissipation;Two-compartment model

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

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收录情况： SCI

摘要： This work is the first report on the dissipation and final residue of cloransulam-methyl on soybean plant at field conditions. A fast, simple, and reliable residue analytical method for determination of cloransulammethyl in soybean matrices and soil was developed based on quick, easy, cheap, effective, rugged, and safe (QuEChERS) sample preparation and liquid chromatography-tandem mass spectrometry (LC-MS/MS) detection. The average recoveries of cloransulammethyl in soybean matrices and soil ranged from 80 to 105 %, with RSDs between 3-11%. The limit of detection (LOD) was 0.001 mg kg(-1) for soybean grain, plant, and soil and was 0.005 mg kg(-1) for soybean straw. This method was then used to characterize dissipation of cloransulam-methyl in soybeans and soil from three locations in China for the first time. Cloransulam-methyl dissipated quickly in soybean plant with half-lives (T-1/2) of 0.21-0.56 days. The dissipation dynamic in soil was characterized using both first-order kinetics model and twocompartment model, and the half-lives were similar, ranging from 0.44 to 5.53 days at three experimental sites in 2012 and 2013. The final residue data showed a very low level of cloransulam-methyl in soil (<= 0.026 mg kg(-1)), soybean grain (<= 0.001 mg kg(-1)), and straw (<= 0.005 mg kg(-1)) samples at harvest time. With the faster and simple analytical method on soybean and soil, rapid dissipation of cloransulam-methyl was observed at three geospatial locations in China, and the terminal residue levels were negligible, so mammalian ingestion exposure is minimal.