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- Title
超高效液相色谱-串联质谱法检测绿茶中 16 种农药残留.
- Authors
李自强; 杨梅; 张新忠; 罗逢健; 周利; 楼正云; 孙荷芝; 王新茹; 陈宗懋
- Abstract
An analytical method was developed for the simultaneous determination of 16 pesticide residues in green tea by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The target pesticides in tea samples were extracted by acetonitrile with 1% formic acid, cleaned up by a TPT-SPE column, ionized in electrospray positive ionization source (ESI+ ) mode, and scanned for determination of the target parent and daughter ions by mass spectrometry in multiple reaction monitoring mode (MRM). The results show that the target pesticides were linear in the range of 0.005-1.000 mg·kg-1 with the correlation coefficient R² >0.992 6. The average recoveries ranged from 74.0% to 105.4% at the four spiked levels of 0.010, 0.050, 0.100、1.000 mg·kg-1, and the relative standard deviations (RSD) were <20.0%. The limits of quantification were 10-50 μg·kg-1. The method is fast and sensitive, and the technical parameters are in accordance with the relevant domestic and international regulations and standards. And it can meet the requirements of simultaneous determination of various pesticide residues in green tea.
- Subjects
LIQUID chromatography-mass spectrometry; PESTICIDE pollution; GREEN tea; DAUGHTER ions; PESTICIDE residues in food; MASS spectrometry; ELECTROSPRAY ionization mass spectrometry
- Publication
Journal of Tea Science, 2022, Vol 42, Issue 4, p537
- ISSN
1000-369X
- Publication type
Article