Synthesis of PANI/Fe3O4 magnetic nanoparticles for the extraction and determination of triazine herbicides from water samples by high performance liquid chromatography

In this study, a novel polyaniline/magnetic nanoparticle composite was synthesized. The prepared compositewas characterized using scanning electron microscopy (SEM), FT-IR, X-ray diffraction (XRD), vibrating samplemagnetometry (VSM) and thermal gravimetric analysis (TGA). SEM images show a rather high surface area of compositeand also indicate well coverage of Fe3O4 nanoparticles by polyaniline (PANI). FT-IR spectra confirm successfullysynthesis of PANI on Fe3O4 nanoparticles. Magnetic saturation for Fe3O4 is obtained 50 emu/g and it is found 15 emu/gfor coated Fe3O4. TGA curve shows that the portion of conductive polymer in polyaniline/Fe3O4 composite is 47.33%.Then it is potential as a sorbent in magnetic solid phase extraction (MSPE) of triazine herbicides was investigated. Theinfluential factors on the MSPE efficiency such as sorbent amount, extraction time, ionic strength, type and volume ofdesorption solvent, and desorption time were investigated and optimized. Under optimum conditions, limit of detectionwere in the range of 0.2-0.9 μg L-1. Calibration curves showed linearity in the range of 1-1000 μg L-1 for most of theanalytes. The proposed method was successfully applied to the extraction of the analytes from different water samplesand relative recoveries were higher than 99% for all the analytes.

کلیدواژه ها:

Polyaniline/ Fe3O4 nanoparticles ، Magnetic solid phase extraction ، Triazine herbicides ، High performanceliquid chromatography ، Water samples