Citation: CAI Weiqiu, LEI Haoyu, HU Yuling, LI Gongke. Determination of seven organophosphorus insecticides in fruits and vegetables by ultra-high performance liquid chromatography-tandem mass spectrometry based on magnetic conjugated microporous polymers[J]. Chinese Journal of Chromatography, ;2020, 38(1): 113-119. doi: 10.3724/SP.J.1123.2019.06033 shu

Determination of seven organophosphorus insecticides in fruits and vegetables by ultra-high performance liquid chromatography-tandem mass spectrometry based on magnetic conjugated microporous polymers

School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China

Corresponding author: HU Yuling, LI Gongke,
Received Date: 29 June 2019

Fund Project: Guangzhou Science and Technology Program of China (No. 201704020040)

A method was developed for the determination of seven organophosphorus insecticides in fruits and vegetables by ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) based on magnetic conjugated microporous polymers (CMPs). Fe₃O₄ nanoparticles modified by phenylene and ethynylene were cross-linked with 1,3,5-tribromobenzene and 1,3,5-trialkynylbenzene to obtain magnetic CMPs. This material with a three-dimensional network structure and covalently built-in Fe₃O₄ nanoparticles could effectively enrich organophosphorus insecticides with a conjugated structure, thus allowing for convenient magnetic separation in an external magnetic field. Under the optimized conditions, the seven organophosphorus pesticides were extracted by using the magnetic CMPs as magnetic solid phase extraction adsorbents. The limits of detection (LODs) of the seven target analytes were in the range of 0.12-5.0 ng/kg. The recoveries were between 80.8% and 125%, and the relative standard deviations (RSDs, n=5) were less than 6%. The organophosphorus insecticides were detected in fruits and vegetables at concentrations in the range of 1.1-500.0 ng/kg. The method is sensitive, accurate and reliable, and it shows good application potential for the determination of the organophosphorus pesticides in fruits and vegetables.
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沈阳化工大学材料科学与工程学院沈阳 110142

Determination of seven organophosphorus insecticides in fruits and vegetables by ultra-high performance liquid chromatography-tandem mass spectrometry based on magnetic conjugated microporous polymers

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com