Food analysis is a very important branch of analytical chemistry, able to provide information about chemical composition, processing, quality control (QC) and contamination of foodstuffs, ensuring compliance with food and trade laws [1]. Pesticides belong among typical food contaminants that are monitored in a wide range of food commodities. Other contaminants may represent various veterinary drugs, especially antibiotics and hormones, in animal-based food, or mycotoxins, allergens, and food additives. Sorbents consist of nano-to micro-sized particles are being rapidly developed. Sorbent materials are of a great scientific and technological interests owing to their tendency to interact with specific substances and also their ability that can be efficiently separated from a mixture. Nowadays, sorbents, especially nanostructured ones, are widely used in sample preparation techniques and also for removal of pollutants from the environment. Application of sorbents considerably simplifies the sample pretreatment process without filtering and centrifugation. It also eases recycle and reuse of the sorbent. Nanocmposite sorbents such as NPs, nanocomposites, are generally used for preconcentration purposes. However, sponges, foams, hydrogel, and beads are generally used for removal purposes. Synthesis of novel magnetic hybrid sorbents by using advanced nanostructured materials such as MOFs, LDHs, G/GO, CNTs, COFs, RAM, MIPs and aptamers are being developed to find more efficient sorbents and introduce different extraction mechanisms at the same time. It is worthy to note that the preparation of novel nanocomposites are attractive approaches which leads to an efficient and selective extraction of target analytes form complex matrices without any pretreatment steps. Efficiency and simplicity of MSPE, QuEChERS, IT-SPME, SBSE and DLLME techniques can be greatly improved by using nanostructured sorbents [2]. In addition, automation of these techniques are other attractive trends. Finally, the preparation of novel and emerging sorbents with high adsorption capacity as possessing different functional groups to remove a wide range of contaminants especially in food samples.
