Nanomaterial-based magnetic surface molecularly imprinted polymers for specific extraction and efficient recognition of dibutyl phthalate

Shan Wang; Jingying Yang; Jiaqing Sun; Kaixin Liu; Xiaoqian Xie; Liping Hong; Shuo Wang; Mingfei Pan

doi:10.1016/j.foodchem.2023.136621

Nanomaterial-based magnetic surface molecularly imprinted polymers for specific extraction and efficient recognition of dibutyl phthalate

Food Chem. 2023 Nov 15:426:136621. doi: 10.1016/j.foodchem.2023.136621. Epub 2023 Jun 19.

Authors

Shan Wang¹, Jingying Yang¹, Jiaqing Sun¹, Kaixin Liu¹, Xiaoqian Xie¹, Liping Hong¹, Shuo Wang², Mingfei Pan³

Affiliations

¹ State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Food Quality and Health, Tianjin University of Science and Technology, Tianjin 300457, China.
² State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Food Quality and Health, Tianjin University of Science and Technology, Tianjin 300457, China. Electronic address: s.wang@tust.edu.cn.
³ State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Food Quality and Health, Tianjin University of Science and Technology, Tianjin 300457, China. Electronic address: pmf2006@sina.com.cn.

PMID: 37354582
DOI: 10.1016/j.foodchem.2023.136621

Abstract

A rapid and selective sorbent for the enrichment of dibutyl phthalate (DBP) from water and Chinese Baijiu samples was established using magnetic surface molecularly imprinted polymers (MSMIPs) combined with gas chromatography-mass spectrometer (GC-MS). The MSMIPs were synthesized using a magnetic nanosphere material with silica layer, increasing the polymer surface area as a carrier. Compared with the traditional methods, the addition of magnetic microspheres simplified the process of food substrate purification and significantly shortened the pre-concentration time. The MSMIPs adsorption conforms to the Freundlich isotherm model as multilayer adsorption on an inhomogeneous surface and the pseudo-second-order model. The developed MSMIPs combined with GC-MS method showed good linearity in DBP concentration range of 0.02-1.0 mg L^-1 with low LOD (0.0054 mg L^-1) and LOQ (0.018 mg L^-1), and obtained good recoveries in real samples (95.2-97.2%) with RSD < 5.0% (n = 9), which were consistent with those from Chinese national standard method.

Keywords: Adsorption; DBP; GC-MS; Magnetic separation; Molecularly imprinted polymers.

MeSH terms

Adsorption
Dibutyl Phthalate
Magnetic Phenomena
Molecular Imprinting* / methods
Molecularly Imprinted Polymers
Nanostructures*
Solid Phase Extraction / methods

Substances

Dibutyl Phthalate
Molecularly Imprinted Polymers