Rapid screening of illegally added insecticides in pesticide formulations by ultra performance liquid chromatography-quadrupole-time of flight mass spectrometry

doi:10.3724/SP.J.1123.2016.05009

Abstract

Abstract:

An analytical method was established for the rapid screening of 48 illegally added insecticides in pesticide formulations by ultra performance liquid chromatography-quadrupole-time of flight mass spectrometry (UPLC-Q-TOF MS). Three pesticide formulations of wettable powder, emulsifiable concentrate, suspension concentrate were extracted with methanol, then detected by UPLC-Q-TOF MS. The calibration curves were linear in the range of 0.5-20 mg/L with the correlation coefficients more than 0.99 for the 48 insecticides. The limits of quantification (LOQs) were 0.05-0.4 mg/kg. The limits of detection (LODs) were 0.01-0.2 mg/kg. The added recoveries for all the insecticides were 86.3%-101.5% with the relative standard deviations ranging from 1.7% to 4.0%. This method has the characteristics of rapid and accurate screening, which can meet the requirement of the determination of the 48 insecticides in pesticide formulations.

Key words: insecticide, pesticide formulations, rapid screening, ultra performance liquid chromatography-quadruple-time of flight mass spectrometry (UPLC-Q-TOF MS)

CLC Number:

O658

CHEN Jianbo, MA Lin, HUANG Lanqi, WU Aijuan, ZHAN Xiuping, ZHAO Li. Rapid screening of illegally added insecticides in pesticide formulations by ultra performance liquid chromatography-quadrupole-time of flight mass spectrometry[J]. Chinese Journal of Chromatography, 2016, 34(9): 880-887.

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