Simultaneous determination of procymidone, pyridaben and beta-cypermethrin residues in tea solution by GC-ECD

文献类型： 外文期刊

第一作者： Zhang, Changpeng

作者： Zhang, Changpeng;Zhao, Hua;Wu, Min;Hu, Xiuqing;Cai, Xiaoming;Ping, Lifeng;Li, Zhen

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期刊名称：JOURNAL OF CHROMATOGRAPHIC SCIENCE （ 影响因子：1.618； 五年影响因子：1.682 ）

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收录情况： SCI

摘要： 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.

分类号： O65

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