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Development of a new and facile method for determination of chlorpyrifos residues in green tea by dispersive liquid-liquid microextraction

文献类型： 外文期刊

作者： Tian, Hai 1 ; Feng, Yujie 3 ; Yang, Xinfeng 1 ; Li, Shuhuai 1 ; Pang, Chaohai 1 ; Ma, Chen 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Anal & Testing Ctr, Haikou, Hainan, Peoples R China

2.Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Haikou, Hainan, Peoples R China

3.Hainan Acad Agr Sci, Inst Plant Protect, Minist Agr, Haikou, Hainan, Peoples R China

4.Sci Observat & Expt Stn Crop Pests HaiKou, Haikou, Hainan, Peoples R China

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.996； 五年影响因子：5.516 ）

ISSN： 2045-2322

年卷期： 2022 年 12 卷 1 期

页码：

收录情况： SCI

摘要： In this work a simple, rapid, and environmentally friendly method has been established for the determination of chlorpyrifos residue in green tea by dispersive liquid-liquid microextraction and gas chromatography-flame photometric detection. Some experimental parameters that influence extraction efficiency, such as the kind and volume of disperser solvents and extraction solvents, extraction time, addition of salt and pH, were investigated. And the optimal experimental conditions were obtained, quantitative analysis was carried out using external standard method. The correlation coefficient of the calibration curves was 0.999 with in 0.05 mg/kg to 5 mg/kg. The results showed that under the optimum conditions, the enrichment factors of the chlorpyrifos was about 554.51, the recoveries for standard addition fell in the range from 91.94 to 104.70% and the relative standard deviations was 4.61%. The limit of quantification of chlorpyrifos in green tea was 0.02 mu g/mL at the signal/noise ratio of 3.

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