Abstract
Abstract Organophosphorus pesticides are currently extensively applied on the control of agricultural and forestry pests. The number of poisonings and deaths caused by organophosphorus pesticides are increasing year by year. Because of the complex matrix, numerous interfering substances, and low poison content, pretreatment methods are crucial for the detection and analysis of such cases. As an adsorbent used for pretreatment, magnetic nanoparticles have the advantages of simple preparation, convenient modification, superparamagnetism, and hydrophilicity. Microextraction can be performed with small amount of magnetic nanoparticles in a short time, and the target substances can be separated with an external magnetic field. In this paper, the latest research achievements are reviewed. Based on the introduced characteristics and preparation methods of magnetic nanoparticles, this paper outlines the applications of different functionalized magnetic nanoparticles for the pretreatment of organophosphorus pesticides and predict the potential research prospects.
Highlights
Organophosphorus pesticides are currently extensively applied on the control of agricultural and forestry pests
Mahpishanian et al [46] reported that the reduced graphene oxide (GO) sheets anchored with Fe3O4 Magnetic nanoparticles (MNPs) simultaneously self-assembled into a 3D hydrogel with interconnected networks driven by combined hydrophobic and stacking interactions, a black magnetic 3D-G aerogel was generated via vacuum freeze drying
Mahpishanian et al [47] and Wang et al [48] studied the extraction of Organophosphorus pesticides (OPPs) with covalently bonded MNPs-G composites, and the results showed that the stability of the material was significantly improved
Summary
Abstract: Organophosphorus pesticides are currently extensively applied on the control of agricultural and forestry pests. Considering the complexity and compatibility of substrates, operation difficulty, preparation cost, particle-size distribution, and magnetic saturation strength, coprecipitation and hydrothermal synthesis methods are prevalent in the recent research on Fe3O4 MNPs for the pretreatment of samples containing OPPs. Surface chemical properties of MNPs can be modified to generate new functional groups and effectively improve stability, so the MNPs could have the adsorption capacity for target compounds [26,27,28,29,30]. The common materials for the functionalization of MNPs for the pretreatment of samples containing OPPs include carbon-based materials, inorganic materials, polymer materials, metal organic framework materials, mixed micelles, ionic liquids (ILs), and so on These different materials show different adsorption characteristics
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