Citation: YANG Song, LIU Shang-Ke, ZHANG Jun-Jie, HU Pei-Jie, CAO Chang-Peng, ZOU Nan. Detection of 10 Kinds of Pesticide Residues in Tea Based on Novel Mesoporous Materials-QuEChERS-Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2021, 49(5): 830-838. doi: 10.19756/j.issn.0253-3820.201656 shu

Detection of 10 Kinds of Pesticide Residues in Tea Based on Novel Mesoporous Materials-QuEChERS-Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry

Provincial Key Laboratory of Pesticide Toxicology & Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China

Corresponding author: ZOU Nan, zounan1226@163.com
Received Date: 6 November 2020
Revised Date: 19 January 2021

Fund Project: Supported by the National Key R&D Program of China (No.2018YFC1604401) and the Guangxi Special Fund Project (No.AA17204043-1).

Based on QuEChERS and with self-synthesized novel mesoporous materials (SBA-15-C₁₈) as a purification agent, a method for determination of 10 kinds of pesticide residues in tea matrix by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was developed. With the action of template, SBA-15 was prepared by solution chemical reaction method, and SBA-15-C₁₈ was then prepared by in-situ co-condensation method on the surface of SBA-15 with octadecyl silane coupling agent. And they were characterized by scanning electron microscopy and infrared spectroscopy. The sample was extracted with acetonitrile, purified by SBA-15-C₁₈, nano-zirconia and multi-wall carbon nanotube tubes, and quantitatively analyzed by external standard method of UPLC-MS/MS. The results showed that SBA-15-C₁₈ had a two-dimensional through-hole structure, uniform particle size and a cylindrical curved shape, with average particle size of 240-340 nm. In the concentration range of 0.0025-0.5 mg/L, the standard solution concentration of 10 kinds of target pesticides in tea matrix showed a good linear relationship with the corresponding chromatographic response value, and the correlation coefficients were between 0.9978 and 0.9999. The average recoveries of the 10 kinds of pesticides at three addition levels of 0.01, 0.1 and 20 mg/kg were between 72% and 111%, and RSDs were 1.0%-6.9%. The limits of detection of 10 kinds of pesticides in tea matrix were 0.1-0.3 μg/kg, and the limits of quantification were 0.2-0.9 μg/kg. The method was applied to monitoring of the samples of the main tea varieties. The method had many advantages such as high sensitivity, strong versatility, high accuracy, good stability and easy operation, and was suitable for detection of pesticide residues in tea.
- Tea,
- Mesoporous material SBA-15-C₁₈,
- Ultra performance liquid chromatography-tandem mass spectrometry,
- Pesticide residues
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