Residue Determination of Hexythiazox and Buprofezin in Tea, Marrow and Mango by Gas Chromatography Coupled with Tandem Mass Spectrometry after Dispersive Solid Phase Extraction Cleanup
文献类型： 外文期刊
作者： Zhang Xin-Zhong;Luo Feng-Jian;Liu Guang-Ming;Lou Zheng-Yun;Chen Zong-Mao;Zhang Xin-Zhong;Luo Feng-Jian;Liu Guang-Ming;Lou Zheng-Yun;Chen Zong-Mao;Zhang Xin-Zhong;Luo Feng-Jian;Liu Guang-Ming;Lou Zheng-Yun;Chen Zong-Mao;Zhang Fen
作者机构：
关键词： Dispersive solid phase extraction;Gas chromatography tandem mass spectrometry;Tea;Mango;Marrow;Hexythiazox;Buprofezin
期刊名称： CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
ISSN： 0253-3820
年卷期： 2012 年 40 卷 11 期
页码：
收录情况： SCI
摘要： A novel and sensitive method was developed and validated for the simultaneous determination of hexythiazox and buprofezin residue in tea, mango and marrow using gas chromatography coupled with tandem mass spectrometry. Target compounds were extracted by acetonitrile followed by dispersive solid phase extraction cleanup. The fragmentation pathway and matrix effect were investigated. Over the concentration in the range of 0.040-4.000 mg/L for buprofezin and 0.025-2.5 mg/L for hexythiazox in different matrix, the correlation coefficients (r) of the calibration curves were above 0.9910, and the limits of detection (LODs) were 0.005 mg/L and 0.010 mg/L for each other. The average recoveries of hexythiazox and buprofezin in different matrix at three spiked concentration levels ranged from 83.6% to 116.9% with relative standard deviations (RSDs) between 2.0% and 15.7% (n=5). The limits of quantitation (LOQs) of hexythiazox and buprofezin, were 0.010 mg/kg in green tea and 0.002 mg/kg in marrow and mango sample. Then, the proposed method was successfully applied to the routine market monitoring of mango and marrow in different regions in China, there was no hexythiazox and buprofezin residue detected in the all of samples (n=120); and it has also been applied to the residue analysis of buprofezin field test samples (n=20) in tea garden, the residues of buprofezin were from not detected to 3.9 mg/kg.
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