Covalent organic framework-functionalized magnetic MXene nanocomposite for efficient pre-concentration and detection of organophosphorus and organochlorine pesticides in tea samples before gas chromatography-triple quadrupole mass spectrometry analysis.

Autor: Jiang L; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China., Dong G; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China., Song D; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China., Liu W; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China., Geng X; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China., Meng D; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China., Nie L; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China., Liao J; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China., Zhou Q; College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China.. Electronic address: zhouqx@cup.edu.cn.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2024 Nov 30; Vol. 459, pp. 140352. Date of Electronic Publication: 2024 Jul 04.
DOI: 10.1016/j.foodchem.2024.140352
Abstrakt: In this study, a hydrophobic covalent organic framework-functionalized magnetic composite (CoFe 2 O 4 @Ti 3 C 2 @TAPB-TFTA) with a high specific area with 1,3,5-tris(4-aminophenyl)benzene (TAPB) and 2,3,5,6-tetrafluoroterephthalaldehyde (TFTA) was designed and synthesized through Schiff base reaction. An efficient magnetic solid-phase extraction method was established and combined with gas chromatography-triple quadrupole mass spectrometry to sensitively determine 10 organochlorine and organophosphorus pesticides in tea samples. The established method exhibited good linearity in the range of 0.05-120 μg/L and had low limits of detection (0.013-0.018 μg/L). The method was evaluated with tea samples, and the spiked recoveries of pesticides in different tea samples reached satisfactory values of 85.7-96.8%. Moreover, the adsorption of pesticides was spontaneous and followed Redlich-Peterson isotherm and pseudo-second-order kinetic models. These results demonstrate the sensitivity, effectiveness, and reliability of the proposed method for monitoring organochlorine and organophosphorus pesticides in tea samples, providing a preliminary basis for researchers to reasonably design adsorbents for the efficient extraction of pesticides.
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 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: