Simultaneous Determination of Procymidone, Pyridaben and Beta-Cypermethrin Residues in Tea Solution by GC-ECD

A sensitive and effective method for the simultaneous quantitative determination of procymidone, pyridaben and beta-cypermethrin residues in tea solutions was developed and validated using a gas chromatograph (GC) equipped with an electron capture detector (ECD). The analysis of the three pesticides...

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Bibliographic Details
Published in:Journal of chromatographic science 2012-11, Vol.50 (10), p.940-944
Main Authors: Zhang, Changpeng, Zhao, Hua, Wu, Min, Hu, Xiuqing, Cai, Xiaoming, Ping, Lifeng, Li, Zhen
Format: Article
Language:English
Subjects:
Acetates
Analytical chemistry
Biological and medical sciences
Bridged Bicyclo Compounds - analysis
Cartridges
Chromatography, Gas - methods
Coffee, tea and other stimulative beverage industries
Extraction
Food industries
Fundamental and applied biological sciences. Psychology
General pharmacology
Indexing in process
Legislation
Limit of Detection
Linear Models
Medical sciences
Pesticide Residues - analysis
Pharmacognosy. Homeopathy. Health food
Pharmacology. Drug treatments
Pyrethrins - analysis
Pyridazines - analysis
Recovery
Reproducibility of Results
Residues
Tea
Tea - chemistry
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Summary:A sensitive and effective method for the simultaneous quantitative determination of procymidone, pyridaben and beta-cypermethrin residues in tea solutions was developed and validated using a gas chromatograph (GC) equipped with an electron capture detector (ECD). The analysis of the three pesticides in tea solutions involved extraction with petroleum ether-ethyl acetate (3:1, v/v), cleanup using a Florisil solid-phase extraction cartridge and subsequent determination by GC-ECD. Recovery studies were carried out at three spiked levels (0.05, 0.1 and 0.5 mg/kg). The overall average recoveries using this method in green teas and black teas at the three concentration levels ranged from 85.63 to 105.80% with relative standard deviations in the range of 1.29-4.97% (n = 5) for all analytes. The quantification limits of procymidone, pyridaben and beta-cypermethrin were 0.025, 0.038 and 0.030 mg/kg, respectively, which were lower than the maximum residue limits (MRLs) of 0.1 mg/kg procymidone, 0.05 mg/kg pyridaben and 0.5 mg/kg beta-cypermethrin in tea samples established by European Union legislations. This study provides a theoretical basis for China to draw up MRLs for procymidone, pyridaben and beta-cypermethrin in tea solutions.
ISSN:0021-9665
1945-239X
DOI:10.1093/chromsci/bms094