Synthesis of Magnetic Metal-Organic Frame Material and Its Application in Food Sample Preparation

Abstract

A variety of contaminants in food is an important aspect affecting food safety. Due to the presence of its trace amounts and the complexity of food matrix, it is very difficult to effectively separate and accurately detect them. The magnetic metal-organic framework (MMOF) composites with different structures and functions provide a new choice for the purification of food matrix and enrichment of trace targets, thus providing a new direction for the development of new technologies in food safety detection with high sensitivity and efficiency. The MOF materials composed of inorganic subunits and organic ligands have the advantages of regular pore structure, large specific surface area and good stability, which have been thoroughly studied in the pretreatment of complex food samples. MMOF materials combined different MOF materials with various magnetic nanoparticles, adding magnetic characteristics to the advantages of MOF materials, which are in terms of material selectivity, biocompatibility, easy operation and repeatability. Combined with solid phase extraction (SPE) technique, MMOF materials have been widely used in the food pretreatment. This article introduced the new preparation strategies of different MMOF materials, systematically summarizes their applications as SPE adsorbents in the pretreatment of food contaminants and analyzes and prospects their future application prospects and development directions.

Magnetic Solid Phase Extraction for Determination of Dyes in Food and Water Samples

“…Magnetic MOFs materials were used in MSPE, such as MOF-5 (Zn 4 O(BDC) 3 ) (BDC=1,4-benzenedicarboxylate) with a cubic 3D porous structure, ZIF-8([Zn(MeIM) 2 ]) and ZIF-67 ([Co(MeIM) 2 ]) (MeIM=2-methylimidazole). The advantages of MOFs are large pore volume, mechanical and chemical stability, superparamagnetism, and working at a high temperature, making MOFs more useful for the MSPE [52][53][54]. Overall, the choice of inorganic, organic, or MOF modification will depend on the specific application and the properties required for the MNPs.…”

Aspects of high-performance and bio-acceptable magnetic nanoparticles for biomedical application

“…MMOFs are the integration of MNPs to the surface or pore of MOFs possessing the dual properties of MNPs and MOFs [61] . Hashemipour et al prepared copper-based MMOF for the sustained delivery of letrozole.…”

Functional Hybrid Micro/Nanoentities Promote Agro-Food Safety Inspection

“…In particular, the combination of magnetic nanoparticles and MOFs to form magnetic MOF (MMOF) materials has attracted great interest from researchers by the feature of localization or collection by an external magnetic field . The combination of MOF material and magnetic nanoparticles has the following advantages: − (1) The target ability of MMOF material application was enhanced. By selection of suitable target substances and regulation of the synthesis conditions, MMOF materials could be constructed for specific applications (e.g., catalysis, adsorption, and release).…”