Advances of the fluorine-containing materials for sample preparation in food field

Abstract

Since food contaminants have posed a serious threat to food safety, accurate detection of them is particularly crucial. Sample preparation is playing an increasingly important role in the analysis and detection of contaminants. The enrichment efficiency of the target analyte and the removal effect of the sample matrix are highly dependent on the adsorption material. Some emerging materials, such as covalent organic frameworks (COFs), metal organic frameworks (MOFs) and other porous materials as adsorbents, have attracted increasing research interest in sample preparation, as they enhance the analytical performance of many existing sample preparation techniques or allow for the development of new ones. Among emerging materials, the fluorine-containing materials have been developed for sample preparation by virtue of special physical and chemical properties resulting from fluorine element with strong electronegativity. Introducing fluorine into organic compounds can improve the chemical and thermal stability of adsorbent materials in the field of sample preparation. This review provides an overview of the main preparation strategies for fluorine-containing materials and introduces some of the latest examples of their analytical applications in food (including beverage and drinking water samples) sample preparation from 2019 to date. In addition, the challenges and prospects of fluorine-containing materials in food sample preparation are also introduced.