Determination of 255 pesticides in edible vegetable oils using QuEChERS method and gas chromatography tandem mass spectrometry

详细信息    查看全文

• 作者：Zeying He ; Yuehua Wang ; Lu Wang ; Yi Peng…
• 关键词：QuEChERS ; Pesticide residue ; Vegetable oil ; GC–MS/MS
• 刊名：Analytical and Bioanalytical Chemistry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：409
• 期：4
• 页码：1017-1030
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Analytical Chemistry; Biochemistry, general; Laboratory Medicine; Characterization and Evaluation of Materials; Food Science; Monitoring/Environmental Analysis;
• 出版者：Springer Berlin Heidelberg
• ISSN：1618-2650
• 卷排序：409

文摘

In this study, a simple and high-throughput method for determination of 255 pesticides in vegetable oils was developed based on QuEChERS sample preparation method combined with gas chromatography–triple quadrupole mass spectrometry. Different clean-up approaches were tested: A, 150 mg PSA + 150 mg C18; B, 250 mg PSA + 250 mg C18; C, 250 mg PSA + 250 mg C18 + 15 mg GCB; D, 250 mg PSA + 250 mg C18 + 50 mg GCB; and E, EMR-LipidTM. Best clean-up capacity was observed for EMR clean-up. The extraction procedures and parameters, including extraction time, solvent/sample ratio, and buffer system, were also thoroughly investigated and optimized. The limits of quantification (LOQ) ranged between 5 and 50 μg kg−1, and for the majority of the pesticides the LOQs were 5 μg kg−1, which were below the regulatory MRLs. Most recoveries at seven spiking levels were in the range of 70–120 % with RSDs <20 % indicating satisfactory accuracy. The coefficient of determination (r2) was >0.99 within the calibration linearity range of 2–500 μg L−1 for the majority of the pesticides. This method was proved to be simple, sensitive, and effective, which can be applied for large-scale pesticide screening and quantification in vegetable oils.