Ionic liquid-functionalized covalent organic frameworks on the surface of silica for online solid-phase extraction.

Autor: Li X; Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China., Sun M; Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China., Feng Y; Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China., Liu Y; Shandong Institute for Food and Drug Control, Key Laboratory of Supervising Technology for Meat and Meat Products for State Market Regulation, Shandong Research Center of Engineering and Technology for Quality Control of Food for Special Medical Purposes, Shandong Research Center of Engineering and Technology for Safety Inspection of Food and Drug, Jinan 250101, PR China., Wang Y; Shandong Institute for Food and Drug Control, Key Laboratory of Supervising Technology for Meat and Meat Products for State Market Regulation, Shandong Research Center of Engineering and Technology for Quality Control of Food for Special Medical Purposes, Shandong Research Center of Engineering and Technology for Safety Inspection of Food and Drug, Jinan 250101, PR China., Feng J; Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China. Electronic address: chm_fengjuanjuan@ujn.edu.cn., Sun M; Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China. Electronic address: chm_sunm@ujn.edu.cn.
Jazyk: angličtina
Zdroj: Journal of chromatography. A [J Chromatogr A] 2024 Sep 13; Vol. 1732, pp. 465200. Date of Electronic Publication: 2024 Jul 20.
DOI: 10.1016/j.chroma.2024.465200
Abstrakt: A covalent organic framework (COF) was gown on porous silica with 1,3,5-tri(4-aminophenyl)benzene and 2,5-divinyl-1,4-phenyldiformaldehyde as monomers, and two ionic liquids were grafted to COF by a click reaction. The materials before and after the modification of ionic liquids were separately packed into solid-phase extraction columns (10 × 4.6 mm, i.d.), which were coupled with liquid chromatography to construct online analysis systems. The extraction mechanisms of polycyclic aromatic hydrocarbons, bisphenols, diphenylalkanes and benzoic acids were investigated on these materials. There were π-π, hydrogen-bond and electrostatic interactions on ionic liquid-functionalized sorbents. After the comparison among these materials, the best sorbent was used, and the analytical method was established and successfully applied to the detection of some estrogens from actual samples. For the analytical method, the detection limit was as low as 0.005 μg L -1 , linear range was as wide as 0.017-10.0 μg L -1 , and enrichment ratio was as high as 3635. The recoveries in actual samples were 70 %-129 %.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier B.V.)
Databáze: MEDLINE
Externí odkaz: