Magnetic molecular imprinted covalent organic framework composite for the magnetic solid-phase extraction of bisphenol AF

化学 双酚A 固相萃取 色谱法 吸附 分子印迹聚合物 解吸 深共晶溶剂 溶剂 高效液相色谱法 双酚 核化学 选择性吸附 有机化学 环氧树脂 选择性 催化作用 共晶体系 合金
作者
Luchun Wang,Qiuyi Liu,Yuemeng Zou,Shaochi Liu,Yulian Yang,Yongqing Tao,Mingyue Wang,Lingling Li,Dandan Wang,Die Gao
出处
期刊:Journal of Chromatography A [Elsevier BV]
卷期号:1717: 464693-464693 被引量:13
标识
DOI:10.1016/j.chroma.2024.464693
摘要

A magnetic molecular imprinted covalent organic framework composite (MCOF-MIP) that possessed the 'dual-selectivity' of a covalent organic framework and molecular imprinted polymer (MIP) with rapid response performance was successfully prepared for the removal of bisphenol AF (BPAF) from real water and blood samples. First, the MCOF was separately synthesized using magnetic Fe3O4 as the magnetic core, 1,3,5-triaminobenzene and 2,5-dibromobenzene-1,4-diformaldehyde as precursors and a deep eutectic solvent (DES) as the solvent using a solvothermal synthesis method. The MCOF showed high crystallinity and good adsorption capacities for BPAF (107.4 mg g−1), bisphenol A (113.6 mg g−1), bisphenol S (120.0 mg g−1) and bisphenol F (82.1 mg g−1). To further improve the selectivity for BPAF, an MIP, which uses BPAF as a template, was introduced to form the MCOF-MIP. Due to the dual selectivity of MCOF and MIP, the MCOF-MIP exhibited relatively high selective adsorption capacity to BPAF (243.1 mg g−1) compared to that for the MCOF (107.4 mg g−1), while the adsorption capacities (149.7–109.4 mg g−1) for the other three compounds were not significantly improved. Furthermore, a magnetic solid-phase extraction (MSPE) method was established, and MSPE parameters such as adsorbent dosage, adsorption time, desorption solvent and desorption time were optimized. Combined with high-performance liquid chromatography with diode-array detection (HPLC-DAD) analysis, a rapid and sensitive method was developed to detect BPAF, which showed good linearity (r > 0.9969) ranging from 0.1 to 400 μg mL–1. Low limits of detection (0.04 μg mL–1, S/N = 3) and quantitation (0.1 μg mL–1, S/N = 10) and good precision with low relative SDs (<1.2 % for intra-day and <1.1 % for inter-day) were also obtained. Finally, MSPE coupled with HPLC-DAD was employed for the analysis of BPAF in water and blood samples, and the recoveries of BPAF were satisfactory (91.1–112.6 %).
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