Fabrication of magnetic covalent organic framework for effective and selective solid-phase extraction of propylparaben from food samples

Xiao-Shuai Yang; Lu-Liang Wang; Yu-Shen Liu; Chun-Xu Yang; Jie Zhao; Shi-Lei Ji; Quan-Wen Liu; Zhen-Hua Hu; Fang-Jie Liu; Ping Wang

doi:10.1016/j.foodchem.2022.132843

Fabrication of magnetic covalent organic framework for effective and selective solid-phase extraction of propylparaben from food samples

Food Chem. 2022 Aug 30:386:132843. doi: 10.1016/j.foodchem.2022.132843. Epub 2022 Mar 30.

Authors

Affiliations

¹ School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China.
² School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China; Institute of Bionanotechnology, Ludong University, Yantai, Shandong 264025, PR China. Electronic address: luliangking@126.com.
³ School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China; Institute of Bionanotechnology, Ludong University, Yantai, Shandong 264025, PR China.
⁴ Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng, Shandong 252059, PR China.

PMID: 35381536
DOI: 10.1016/j.foodchem.2022.132843

Abstract

Efficient magnetic solid phase extraction using crystalline porous polymers can find important applications in food safety. Herein, the core-shell Fe₃O₄@COFs nanospheres were synthesized by one-pot method and characterized in detail. The porous COF shell with large surface area had fast and selective adsorption for propylparaben via π-π, hydrogen bonding and hydrophobic interactions. The extraction and desorption parameters were evaluated in detail. Under the optimized conditions, the extraction equilibrium was reached only in 5 min, the maximum adsorption capacity for propylparaben was 500 mg g^-1 and the proposed Fe₃O₄@DhaTab-based-MSPE-HPLC-UV method afforded good linearity (4-20000 μg mL^-1) with R² (0.997), low limits of detection (0.55 μg L^-1) and limits of quantification (1.5 μg L^-1). Furthermore, the developed method was applied to determine propylparaben in soft drinks with the recoveries (97.0-98.3%) and relative standard deviations (0.61 to 3.75%). These results revealed the potential of Fe₃O₄@DhaTab as efficient adsorbents for parabens in food samples.

Keywords: Covalent organic framework; Magnetic solid phase extraction; Propylparaben.

MeSH terms

Magnetic Phenomena
Metal-Organic Frameworks*
Parabens*
Solid Phase Extraction

Substances

Metal-Organic Frameworks
Parabens
propylparaben