Preparation of stoichiometric molecularly imprinted polymer coatings on magnetic particles for the selective extraction of auramine O from water

Abstract

A novel magnetic molecularly imprinted polymer for the selective recognition of auramine O was rationally designed via screening from a library of nonimprinted polymers. A stoichiometric ratio of functional monomer (itaconic acid) and template molecule (auramine O) was found to be 1.5. Meanwhile, the synthesized SiO @Fe O was modified by 0.5 mol/L hydrochloric acid to facilitate the preparation of magnetic molecularly imprinted polymer particles. Adsorption experiments showed that the magnetic polymer particles exhibited good selectivity, recoveries, and enrichment performance. The stoichiometric imprinted polymers have been employed for the selective preconcentration of auramine O from lake water sample. The high specificity of the stoichiometric imprinted polymers was proven in the extraction of mixture solution of auramine O, auramine O hydrochloride, and chrysoidine, and the recoveries ranged between 99.66 and 108.75% (RSD 2.6-3.7%, n = 3) for lake water. These results suggest that this method is effective and can be successfully applied to the analysis of auramine O in environmental water samples.

Preparation of a stoichiometric molecularly imprinted polymer for auramine O and application in solid‐phase extraction

“…Therefore, the optimal molar ratio of template AO to functional monomer IA was selected to be 1:1.5 and molecularly imprinted polymers were prepared using this ratio and farther investigated. In our new‐published work , magnetic molecularly imprinted polymer of AOHCl was prepared with this ratio and used in extraction of AOHCl and its analogues from water.…”

Sample Preparation Using Molecularly Imprinted Polymers

“…Another application field is the monitoring of toxins or natural hormones in waters, 94 food 117,168,182 and biological fluids. 181 At last, recent works reported the use of dSPE-MIP for the extraction of pesticides from waters, 160,167 soil, 167 and food extracts, 144,162,185 and of industrial pollutants from waters, 31,33,37,47,158,166,179,183,186 food, 34,68,96,98,180,183 or samples collected in an industrial bioreactor. 53 Another objective of sample purification using MIP is the removal of a class of compounds that interfere with the analysis of the target analytes.…”

Membrane-Protected Molecularly Imprinted Polymer for the Microextraction of Indole-3-butyric Acid in Mung Bean Sprouts

“…The rational design approach was applied for the preparation of MIPs. 23 Selection processes of the functional monomer, cross-linker, and solvent were reported in our previous work. 2 In brief, MIP and NIP were prepared according to the following procedure: 0.203 g (1 mmol) of template (IBA) and 0.376 g (4 mmol) of vinylimidazole (VI) were dissolved in 3.548 g of N , N -dimethylformamide (DMF) in a screw-capped glass vial.…”

“…22 Molecularly imprinted polymers (MIPs) are synthetic materials obtained by copolymerization of functional and cross-linking monomers in the presence of a template molecule. 23,24 MIPs can selectively adsorb a target molecule in preference to other closely related compounds. 25,26 MIPs have superior specific recognition to other sorbents used in SPE.…”