Determination of Ethiprole Enantiomers Residue in Rices Using Solid Phase Extraction-Liquid Chromatography Tandem Mass Spectrometry

文献类型： 外文期刊

第一作者： Zhang Hu

作者： Zhang Hu;Wang Ming-Hua;Zhang Hu;Qian Ming-Rong;Wang Xiang-Yun;Xu Hao;Qi Pei-Pei;Liu Fei

作者机构：

关键词： Liquid chromatography tandem mass spectrometry;Ethiprole;Enantiomeric resolution;Rice

期刊名称：CHINESE JOURNAL OF ANALYTICAL CHEMISTRY （ 影响因子：1.134； 五年影响因子：0.909 ）

ISSN： 0253-3820

年卷期： 2012 年 40 卷 6 期

页码：

收录情况： SCI

摘要： A simple and sensitive enantioselective method for the determination of ethiprole enantiomers in rice was developed by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Ethiprole was enantioseparated with three cellulose-based chiral stationary phases by HPLC-MS/MS. The effects of the mobile phase and column on the enantiosepartion were studied. The direct resolution of ethiprole enantiomers was performed on a cellulose tris (3, 5-dimethylphenylcarbamate) column (Lux Cellulose-2) using methanol-water (60 : 40, V/V) as mobile phase, and (+)-ethiprole and (-)-ethiprole were eluted and determined by a circular dichroism (CD) detector. The ethiprole residues in rice samples were extracted with acetonitrile and cleaned by NH2 column chromatography.HPLC-MS/MS with electrospray in negative ion scan mode was used to determine ethiprole enantiomers. The fortified recoveries of ethiprole enantiomers in rice matrices including polished rice and brown rice were 87.4%-97.8% at fortification levels ranging from 0.01 to 0.2 mg/kg. Relative standard deviations were 3.1%-9.3%. The limits of quantification for ethiprole enantiomers were both 0.003 mg/kg.

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