Facile synthesis and evaluation of three magnetic 1,3,5-triformylphloroglucinol based covalent organic polymers as adsorbents for high efficient extraction of phthalate esters from plastic packaged foods

Dan Wei; Can Zhang; Ao Pan; Ming Guo; Chaoyan Lou; Ju Zhang; Xu Wang; Huizhen Wu

doi:10.1016/j.fochx.2022.100346

Facile synthesis and evaluation of three magnetic 1,3,5-triformylphloroglucinol based covalent organic polymers as adsorbents for high efficient extraction of phthalate esters from plastic packaged foods

Food Chem X. 2022 May 24:14:100346. doi: 10.1016/j.fochx.2022.100346. eCollection 2022 Jun 30.

Authors

Dan Wei¹, Can Zhang², Ao Pan², Ming Guo³, Chaoyan Lou⁴, Ju Zhang¹, Xu Wang², Huizhen Wu⁵

Affiliations

¹ College of Bioscience and Engineering, Hebei University of Economics and Business, Shijiazhuang 050061, China.
² Hangzhou Medical College, Hangzhou, 310053, ChinaZhejiang, 311300, China.
³ Zhejiang Chemical Production Quality Inspection Co., Ltd, Hangzhou 310023, China.
⁴ College of Standardization, China Jiliang University, Hangzhou 310018, China.
⁵ College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China.

Abstract

Three covalent organic polymers (COPs) were successfully fabricated by room-temperature solvent-free mechanochemical grinding method between 1,3,5-triformylphloroglucinol (TP) and p-phenyl enediamine (COP1), benzidine (COP2), 4, 4″-diamino-p-terphenyl (COP3), and followed by coprecipitation on the surface of Fe₃O₄ nanoparticles to form three corresponding magnetic Tp-series COPs. The fabricated magnetic COPs were evaluated and then applied for the extraction of phthalate esters from food samples before gas chromatography-tandem spectrometry analysis. Magnetic COP2 exhibited the highest extraction efficiency, which can be attributed to its larger pore size, and its strong hydrophobic and π-π interactions with phthalate esters. The method possessed good linearity (10-1000 μg·kg^-1), high sensitivity (0.29-2.59 µg·kg^-1 for LODs and 0.97-8.63 µg·kg^-1 for LOQs), and satisfactory recoveries (70.2-108.1%) with relative standard deviations lower than 5.2%. This method has potentials for high efficient separation/preconcentration of hydrophobic phthalate esters from foods.

Keywords: 1,3,5-triformylphloroglucinol based covalent organic polymers; Gas chromatography-tandem spectrometry; Magnetic solid phase extraction; Phthalate esters; Plastic packaged foods.