Rapid screening of pesticide residues in imported grains by ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry

doi:10.3724/SP.J.1123.2017.03024

Abstract

Abstract:

A fast sample pretreatment method by fast pesticide extraction (FaPEx) method combined with ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry was developed for screening of unknown pesticide residues in imported grains. The samples were extracted with 1% (v/v) acetic acid acetonitrile solution, cleaned-up by solid phase extraction column with FaPEx cartridges, and determined by UPLC-Q-TOF. The data was compared with the library with the accurate mass, isotopic distribution, fragmentation information and retention time. The results showed that this method can be used for the rapid screening of pesticide residues in imported grains without the reference standards, and it was applied to the actual screening of imported grain samples. The method is high efficiency, sensitivity and accuracy, which can meet the requirement for the rapid screening of pesticide residues in imported grains.

Key words: fast pesticide extraction (FaPEx) method, grains, pesticide residues, rapid screening, ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry (UPLC-Q-TOF)

CLC Number:

O658

ZHOU Xiujin, CHEN Yu, YANG Saijun, SHAO Honghong, SHEN Biao, ZHAN Shun'an. Rapid screening of pesticide residues in imported grains by ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry[J]. Chinese Journal of Chromatography, 2017, 35(8): 787-793.

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