Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11011787 | Food Chemistry | 2019 | 23 Pages |
Abstract
A rapid and sensitive method was developed to determine 131 pesticides in tea by on-line gel permeation chromatography-gas chromatography tandem mass spectrometer (on-line GPC-GC-MS/MS) using graphitized multi-walled carbon nanotubes (MWCNTs) as dispersive solid phase extraction (DSPE) sorbent in sample pretreatment. Sample clean-up performance of various functionalized MWCNTs and their influences to recoveries were investigated. In the method validation, good linearity correlation coefficients (R2) were obtained, which were higher than 0.99 for all pesticides. The percent recoveries were 78.2%-113.9% at the spiked concentration levels of 20, 50 and 200â¯Âµg/kg with relative standard deviations (RSDs, nâ¯=â¯6) lower than 15.8%. Limits of detections (LODs) were in the range of 0.5-5.0â¯Âµg/kg. This method is simple and fast with relatively high sensitivity and can achieve the requirements of pesticides analysis.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Bingqi Zhu, Xiaoying Xu, Jinwen Luo, Shaoqiang Jin, Wanqin Chen, Zhu Liu, Chunxia Tian,