Efficient Extraction and Determination of Carbamate Pesticides in Vegetables Based on a Covalent Organic Frameworks with Acylamide Sites

Hongying Guo; An Chen; Jinghui Zhou; Yijun Li; Xiwen He; Langxing Chen; Yukui Zhang

doi:10.1016/j.chroma.2021.462799

Efficient Extraction and Determination of Carbamate Pesticides in Vegetables Based on a Covalent Organic Frameworks with Acylamide Sites

J Chromatogr A. 2022 Feb 8:1664:462799. doi: 10.1016/j.chroma.2021.462799. Epub 2022 Jan 2.

Authors

Hongying Guo¹, An Chen¹, Jinghui Zhou¹, Yijun Li², Xiwen He¹, Langxing Chen³, Yukui Zhang⁴

Affiliations

¹ College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China.
² College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China; National Demonstration Center for Experimental Chemistry Education (Nankai University), Tianjin 300071, China.
³ College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China. Electronic address: lxchen@nankai.edu.cn.
⁴ College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.

PMID: 35016080
DOI: 10.1016/j.chroma.2021.462799

Abstract

It is an important challenge to effectively extract and determine pesticides in complex samples. Covalent organic frameworks (COFs) are burgeoning porous crystalline organic materials with good environmental resistance, thus demonstrating great potential as adsorbents in contaminants detection. In this work, we design and synthesize a novel COF-TpDB via 1,3,5-triformylphloroglucinol (Tp) and 4,4'-diaminobenzoylanilide (DB) as well as its packed cartridge for solid phase extraction (SPE) of carbamate pesticides. Simulation calculations showed H-bonding facilitates the adsorption interactions between the carbamate pesticides and TpDB. A method was developed by coupling TpDB as SPE sorbents with high performance liquid chromatography-ultraviolet (HPLC-UV) detection to determine trace carbamate pesticides in vegetables. The established method showed a wide linear range of 0.1-200 ng mL^-1 and low limit of detections (0.005-0.05 ng mL^-1) for four carbamate pesticides. The applicability of TpDB as adsorbent was investigated for determination of trace carbamate pesticides residue in vegetables with satisfactory recoveries of four carbamates in the range of 80.4-101.2%. The results demonstrated that the COF-TpDB offer great potential for efficient extraction of carbamate pesticides from complicate matrices.

Keywords: Carbamate pesticides; Covalent organic frameworks; Solid phase extraction; Vegetable samples.

MeSH terms

Carbamates
Chromatography, High Pressure Liquid
Metal-Organic Frameworks*
Pesticides* / analysis
Solid Phase Extraction
Vegetables

Substances

Carbamates
Metal-Organic Frameworks
Pesticides