分析化学2012，Vol.40Issue(11)：1686-1692,7.DOI:10.3724/SP.J.1096.2012.20093
分散固相萃取净化气相色谱串联质谱法测定茶叶、西葫芦和芒果中噻螨酮和噻嗪酮残留量
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
摘要
Abstract
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.关键词
分散固相萃取/气相色谱串联质谱法/茶叶/西葫芦/芒果/噻螨酮/噻嗪酮Key words
Dispersive solid phase extraction/ Gas chromatography tandem mass spectrometry/ Tea/ Mango/ Marrow/ Hexythiazox/ Buprofezin引用本文复制引用
张新忠,罗逢健,张芬,刘光明,楼正云,陈宗懋..分散固相萃取净化气相色谱串联质谱法测定茶叶、西葫芦和芒果中噻螨酮和噻嗪酮残留量[J].分析化学,2012,40(11):1686-1692,7.基金项目
本文系国家茶叶产业技术体系建设专项资金资助项目(No.CARS-23)、中国农业科学院基本科研业务费专项(No.0032012026)和农业部农药残留标准制(修)订CAC标准转化项目资助 （No.CARS-23）
