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Determination of Pesticide Residues in Strawberries by Ultra-performance Liquid Chromatography-Tandem Mass Spectrometry

文献类型： 外文期刊

作者： Wang, Hui 1 ; Ping, Hua 1 ; Liu, Qingju 1 ; Han, Ping 1 ; Guo, Xiaojun 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Res Ctr Agr Stand & Testing, Beijing 100097, Peoples R China

2.Minist Agr, Risk Assessment Lab AgroProd Beijing, Beijing 100097, Peoples R China

3.Beijing Municipal Key Lab Agr Environm Monitoring, Beijing 100097, Peoples R China

关键词： Pesticide; Strawberry; QuEChERS; Matrix effect; UPLC-MS; MS

期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）

ISSN： 1936-9751

年卷期：

页码：

收录情况： SCI

摘要： A method based on QuEChERS (quick, easy, cheap, effective, rugged, and safe) sample preparation coupled with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was developed for determining 43 pesticide residues in strawberries. The clean-up sorbents were optimized, with 50 mg PSA + 50 mg C18 + 150 mg MgSO4 showing the best performance in d-SPE. The effect of injection volume on matrix effect (ME) was investigated. The proposed method had a linear range of 0.001-0.1 mg kg(-1), and determination coefficients (R-2) were greater than 0.995. Recoveries of the selected pesticides were 70.1-119.6% with relative standard deviations (RSD) at three concentrations (0.01, 0.05, and 0.1 mg kg(-1)) lower than 20%. The limit of quantification (LOQ) of the 43 pesticides was <= 0.005 mg kg(-1). This method was applied to 80 strawberry samples collected from 8 villages in Beijing suburbs, and 12 pesticide residues were quantitatively detected with the concentrations ranging from 0.02 to 2.5 mg kg(-1).

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