Determination of five neonicotinoid pesticide residues in tea by online clean-up-liquid chromatography-tandem mass spectrometry

doi:10.3724/SP.J.1123.2015.10003

Abstract

Abstract:

An online clean-up-liquid chromatography-tandem mass spectrometry method was developed for the determination of five neonicotinoid pesticides (imidacloprid, acetamiprid, thiamethoxam, thiacloprid and clothianidin) in tea. After rehydrated, extracted with acetonitrile, and cleaned-up online, the tea samples were determined by liquid chromatography-tandem mass spectrometry. The results indicated that the limits of quantification for the five neonicotinoid pesticides were 0.01 mg/kg, and the calibration curves were linear in the range of 1.0-10 μ g/L. The spiked recoveries for the five neonicotinoid pesticides from tea were in the range of 68.0%-113.2% with the relative standard deviations between 3.2% and 7.6%. This method is simple, rapid, accurate, and suitable for the simultaneous determination of the five neonicotinoid pesticides in tea.

Key words: liquid chromatography-tandem mass spectrometry (LC-MS/MS), neonicotinoid pesticides, online clean-up, tea

CLC Number:

O658

LI Huisi, HUANG Chaoqun, JIANG Qinting, ZHONG Yingying, ZHU Xiaoyu, CHEN Xiaomei, MO Weimin. Determination of five neonicotinoid pesticide residues in tea by online clean-up-liquid chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography, 2016, 34(3): 263-269.

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