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Se Pu. 2017 Aug 8;35(8):860-866. doi: 10.3724/SP.J.1123.2017.03033.

[Determination of pyrethroid pesticides in tea by series two-solid phase extraction-columns cleanup and gas chromatography-tandem mass spectrometry].

[Article in Chinese]

Author information

1
Physical and Chemical Inspection Institute, Datong Center for Disease Control and Prevention, Datong 037008, China.
2
School of Chemistry and Environment Engineering, Shanxi Datong University, Datong 037009, China.
3
Shanghai Institute of Technology and Strict Testing Measurement, Shanghai 200233, China. why7135280@126.com.

Abstract

A rapid determination method of three pyrethroid pesticides (cyfluthrin, cypermethrin and fenvalerate) in tea was developed by series two-solid phase extraction-column cleanup and external standard method coupled with gas chromatography-tandem mass spectrometry (GC-MS/MS) in 30 min. The pesticide residues in tea were extracted with acetonitrile, and cleaned up by Carb/NH2 and SLH solid-phase extraction columns. After filtration, the target compounds were analyzed by GC-MS and quantified by the external standard method. Under the optimized conditions, good linear ranges of 0.05-2.00 mg/kg were obtained. The limits of detection varied from 0.3 to 1.0 μ g/kg. The linear correlation coefficients were greater than 0.999. At three spiked levels (0.10, 0.50 and 2.00 mg/L), the average recoveries were determined between 80.6% and 116.3% in the four matrices. The inter-day relative standard deviations were between 1.3%-12.6%, and the intra-day relative standard deviations were between 2.7% and 12.1%. This method is simple, fast, and has a good reproducibility, which can meet the requirements of the rapid detection of pyrethroid pesticides in tea.

KEYWORDS:

gas chromatography-tandem mass spectrometry (GC-MS/MS); pyrethroid pesticides; tea

PMID:
29048822
DOI:
10.3724/SP.J.1123.2017.03033
[Indexed for MEDLINE]

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