Mixed matrix of MOF@COF hybrids for enrichment and determination of phenoxy carboxylic acids in water and vegetables

Quanbin Fu; Bingbing Sun; Jun Fan; Minglin Wang; Xin Sun; Geoffrey I N Waterhouse; Peng Wu; Shiyun Ai

doi:10.1016/j.foodchem.2021.131090

Mixed matrix of MOF@COF hybrids for enrichment and determination of phenoxy carboxylic acids in water and vegetables

Food Chem. 2022 Mar 1:371:131090. doi: 10.1016/j.foodchem.2021.131090. Epub 2021 Sep 9.

Authors

Quanbin Fu¹, Bingbing Sun², Jun Fan³, Minglin Wang⁴, Xin Sun⁵, Geoffrey I N Waterhouse⁶, Peng Wu⁷, Shiyun Ai⁸

Affiliations

¹ College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, PR China; College of Chemistry and Material Science, Shandong Agricultural University, Taian 271018, PR China.
² Bio-Organic Chemistry, Institute of Complex Molecular Systems, Department of Biomedical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
³ Weifang Inspection and Testing Center, Weifang 261000, PR China.
⁴ College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, PR China.
⁵ College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, PR China. Electronic address: xsun@sdau.edu.cn.
⁶ School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand.
⁷ College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, PR China. Electronic address: wupengguai@163.com.
⁸ College of Chemistry and Material Science, Shandong Agricultural University, Taian 271018, PR China. Electronic address: ashy@sdau.edu.cn.

PMID: 34537617
DOI: 10.1016/j.foodchem.2021.131090

Abstract

A novel mixed matrix of MOF@COF hybrid was firstly formed by coating of hexahedral cage structure MOF with lightweight porous COF, and applied in dispersive solid-phase extraction of the phenoxy carboxylic acids (PCAs) from water and vegetable samples. Combined with liquid chromatography-tandem mass spectrometry, an excellent method with low limits of detection (0.69-1.79 ng·L^-1/0.002-0.006 ng·g^-1), good reproducibility (1.32%-7.02%/1.81%-6.71%), and excellent linearities (10-1000 ng·L^-1, R ≥ 0.9955/0.04-50 ng·g^-1, R ≥ 0.9966) was established. The adsorption mechanisms deduced that the π-π interaction, hydrophobic effects, hydrogen bond, and halogen bond may promote the excellent adsorption of the PCAs. Finally, the applicability of the method was verified by spiking four kinds of water and vegetable samples with PCAs, and satisfying recoveries were obtained (between 83.3% and 104.9%).

Keywords: Dispersive solid phase extraction; Liquid chromatography-tandem mass spectrometry; Phenoxy carboxylic acids; Water and vegetable samples Adsorption mechanisms.

MeSH terms

Carboxylic Acids* / analysis
Chromatography, High Pressure Liquid
Reproducibility of Results
Solid Phase Extraction
Vegetables
Water*

Substances

Carboxylic Acids
Water