Rapid Determination of 6 Pesticide Residues in Tea by GC-MS/MS
Objective:To establish QuEChERS combined with GC-MS/MS method for the rapid determination of 6 pesticide residues in tea.Method:The tea was soaked in water for 30 min,then QuEChERS was added to extract the salt packet,acetonitrile was used as extraction reagent,QuEChERS purification tube was used for purification,and GC-MS/MS was used for analysis.Result:The correlation coefficient(r2)was greater than 0.99,the limits of detection were 0.76～1.22 μg·kg-1,and the limits of quantification were 2.52～4.06 μg·kg-1,the average recovery were between 67.1%and 93.2%with relative standard deviations of 0.5%～5.8%.Conclusion:The method is simple,accurate and sensitive,and has practical application value for the rapid detection of 6 kinds of pesticides in tea.
gas chromatography/tandem mass spectrometryteapesticide residues
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