Magnetic Molecularly Imprinted Nanoparticles for the Solid-Phase Extraction of Diazinon from Aqueous Medium, Followed its Determination by HPLC-UV

The aim of the present work was to investigate the feasibility of employing the molecular imprinting polymer technique for detecting diazinon using magnetic molecularly imprinted nanoparticles. The magnetic molecularly imprinted nanopar- ticles were prepared in the presence of a template diazinon molecule. These nano- particles exhibited a linear response in the range of 2-20 ppm (y= 0.2634×Cdiazinon - 0.0575, R2=0.9892) for detection of diazinon. The adsorption kinetics and iso- therms and the selectivity efficiencies of diazinon and other structurally related analogues were investigated by HPLC-UV as well, respectively. The results showed that the magnetic molecularly imprinted nanoparticles have high adsorption capacity, controlled selectivity, and direct magnetic separation in aqueous envi- ronments. The results indicates that the spiked recoveries were changed from 73 to 85%, and the RSD was lower than 11.91