一种用于选择性吸附尿S-苯巯基尿酸的杂化分子印迹聚合物

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Brazilian Chemical Society Pub Date : 2023-07-24 DOI:10.21577/0103-5053.20230032

Rafaela Gomes, Marina Tonucci, M. Prete, C. Tarley, B. Baeta, R. Afonso

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引用次数: 0

摘要

以有机单体4-乙烯基吡啶(4-VP)和无机前体正硅酸四乙酯(TEOS)为原料合成了一种杂化分子印迹聚合物(HMIP)，用于选择性提取尿中苯暴露的生物标志物s -苯基巯基酸(u-SPMA)。通过傅里叶红外光谱(FTIR)、热重分析(TGA)和N2吸附-脱附等温线的结构分析对合成吸附剂进行了化学和结构表征。印迹聚合物的选择性和吸附性能通过动力学、等温、热力学和选择性研究进行了评价。动力学数据调整为准二级和颗粒内扩散模型，使得HMIP的选择系数(K)值为0.03 g mg-1 min-1。在288.15 K条件下，其吸附量最大可达284.81 μg -1。

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A Hybrid Molecularly Imprinted Polymer for Selective Adsorption of Urinary S-Phenylmercapturic Acid

A hybrid molecular imprinted polymer (HMIP) obtained by the organic monomer 4-vinylpyridine (4-VP) and the inorganic precursor tetraethyl orthosilicate (TEOS) was synthesized for the selective extraction of urinary S-phenylmercapturic acid (u-SPMA), a biomarker of benzene exposure. The chemical and structural characterization of the synthetic adsorbent was performed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and textural analysis employing N2 adsorption-desorption isotherms. Selective and adsorptive performance of the imprinted polymers were evaluated by kinetic, isothermal, thermodynamic, and selectivity studies. The kinetic data were well adjusted to pseudo-second order and intraparticle diffusion models, leading to selectivity coefficient (K) value of 0.03 g mg-1 min-1 for HMIP. In addition, the adsorption isotherms were better described by the Sip model achieving a maximum adsorption capacity of 284.81 μg g-1 (at 288.15 K).

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来源期刊

Journal of the Brazilian Chemical Society 化学-化学综合

CiteScore

2.90

自引率

7.10%

发文量

审稿时长

3.4 months

期刊介绍： The Journal of the Brazilian Chemical Society embraces all aspects of chemistry except education, philosophy and history of chemistry. It is a medium for reporting selected original and significant contributions to new chemical knowledge.