Facile magnetization of covalent organic framework for solid-phase extraction of 15 phthalate esters in beverage samples

• Published in: Talanta (Oxford) 2020-01, Vol.206, p.120194-120194, Article 120194
• Main Authors: Pang, Yue-Hong, Yue, Qi, Huang, Yu-ying, Yang, Cheng, Shen, Xiao-Fang
• Format: Article
• Language: English
• Subjects: Adsorption; Beverage samples; Beverages - analysis; Covalent organic framework; Esters - analysis; Ferrosoferric Oxide - chemical synthesis; Ferrosoferric Oxide - chemistry; Food Contamination - analysis; Gas Chromatography-Mass Spectrometry - methods; GC-MS/MS; Limit of Detection; Magnetic Phenomena; Magnetic solid phase extraction; Metal-Organic Frameworks - chemical synthesis; Metal-Organic Frameworks - chemistry; Phthalate esters; Phthalic Acids - analysis; Plasticizers - analysis; Solid Phase Extraction - methods; Tandem Mass Spectrometry - methods
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/j.talanta.2019.120194

Phthalate esters (PAEs), a category of widely used plasticizers, are tend to migrate from plastic packaging to drinks. In this paper, we develop a simple and rapid coprecipitation method for synthesis of a magnetic covalent organic framework (COF) adsorbent. The fabricated COF-(TpBD)/Fe3O4 was applied to magnetic solid phase extraction (MSPE) of 15 phthalate esters (PAEs) for subsequent GC-MS/MS determination in beverage samples. The as-synthesized magnetic adsorbent exhibited great potential in PAEs analysis with a limit of detection of 15 PAEs ranged from 0.005 to 2.748 μg L−1 (S/N = 3). The intra-day and inter-day relative standard deviations (RSD) value of the PAEs were less than 8.8% and 9.9%, respectively. The adsorbent can be reused after washing with methanol. The developed method was successfully applied for the determination of trace PAEs in eight beverages with recoveries ranging from 79.3% to 121.8% and RSDs were less than 11.9%. This work provides a simple magnetization process, which facilitates the application of COFs for enrichment and separation of PAEs in beverages with different matrices. [Display omitted] •A simple and rapid coprecipitation method for the preparation of a magnetic covalent organic framework.•COF-based magnetic solid phase extraction efficiently enrich 15 phthalate esters in beverage samples.•Method development for the simultaneous analysis of 15 phthalate esters by GC-MS/MS.