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- Title
固相萃取和分散固相净化-串联质谱测定茶鲜叶 和干茶中的农药残留.
- Authors
杨洁; 周利; 余焕; 孙荷芝; 王新茹; 张新忠; 杨梅; 陈宗懋; 罗逢健
- Abstract
A method for the determination of 9 pesticide residues in fresh and dry tea was established. Residual pesticides in samples were extracted by acetonitrile, purified by Florisil/GCB solid phase extraction column, followed by absorbent of PSA and GCB as dispersed solid phase, and determined by ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) and gas chromatography-mass spectrometry (GC-MS). In the spiked range of 0.005-1.000 mg·kg-1, the average recoveries of target pesticides in fresh leaves and dried tea were 70.3%-103.9%, and the relative standard deviations (RSD) were less than 20%. In the range of 0.005-2.000 mg·kg-1, the linear relationship of target pesticides in fresh leaves and dry tea matrix was good, with r>0.995 4. The limit of quantity (LOQ) was 0.005 mg·kg-1. The test results of actual samples showed that the method was highly sensitive and reproducible, and can meet the requirements of multi-residue detection.
- Publication
Journal of Tea Science, 2020, Vol 40, Issue 3, p397
- ISSN
1000-369X
- Publication type
Article