Determination of Matrix Effects of 11 Pesticides in Six Types of Tea by Gas Chromatography—tandem Mass Spectrometry
The matrix effects of 11 pesticides in six types of tea were investigated and compared using gas chromatography—tandem mass spectrometry combined with QuEChERS pre-treatment method at three different mass concentrations(0.010,0.040,0.16 mg/L).The results showed that all 11 pesticides exhibited enhanced matrix effects in six types of tea,with the strong matrix effect being the main enhancement.The range of matrix effect of green tea is 101.02%～232.28%;the range of matrix effect of floral tea is 108.14%～269.60%;the range of matrix effect of black tea is 124.41%～311.67%;the range of matrix effect of white tea is 127.62%～299.09%;the range of matrix effect of black tea is 120.23%～318.22%;the range of substrate effect of oolong tea is 131.84%～336.03%.The RSD values of 11 pesticides in six types of tea are all less than 10%,indicating that different concentrations of tea matrix solutions have similar matrix effects on the tested pesticides.When detecting the pesticide residue content in tea,it is recommended to use corresponding matrix standards for quantitative detection of the target substance,and to purify the sample multiple times during sample pretreatment to ensure the accuracy of the quantitative results.
teapesticide residuesmatrix effectgas chromatography-tandem mass spectrometry
NETL
NSTL
万方数据
