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.
Highlights
Food is the material basis for human survival, and food safety issues are a great concern of the international community
The obtained magnetic metal-organic framework (MMOF) was demonstrated to have high specific surface area (803.62 m2 /g), good stability, strong magnetic response characteristics, which was further applied as a solid adsorbent of magnetic SPE (MSPE) for food analysis
Method, the reactants were first separated from the solvent and steamed at a high temperature to induce the Metal-organic framework (MOF) material to grow around magnetic nanoparticles (MNPs) [119,120]
Summary
Food is the material basis for human survival, and food safety issues are a great concern of the international community. An ideal food sample pretreatment technology requires high sensitivity, selectivity and reliability, and has fast detection speed and convenient operation This is a very critical step in the process of target analysis and one of the important research directions in the field of analytical chemistry [15]. The diversity and arrangement of metal elements and organic ligands can form different frameworks and pore structures, making the MOFs have different adsorption, optical and electromagnetic properties [35,36,37,38] These characteristics have made MOFs materials widely concerned and used in the fields of sample pretreatment, chemical catalysis, drug delivery [39,40,41,42]. This article summarizes the different preparation strategies of MMOFs currently used as adsorbents for food sample pretreatment, reviews the application of MMOFs in the detection and control of food contaminants, and looks forward to the future development direction and application prospects of MMOFs in the field of food analysis
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