Abstract
The alumina nanoparticles (Al2O3 NPs) prepared by sol-gel method by reaction of aluminum sulfate with ammonia was tested for their adsorption capacity in the extraction of pesticide residues in water. The synthesized nanoparticles (NPs) size was determined by X-ray Diffraction (XRD) and Transmission Electron Microscope (TEM). The surface morphology of NPs was described by Scanning Electron Microscope (SEM). The cartridges of solid phase extraction (SPE) were prepared by Al2O3 NPs and protected between two polytetrafluoroethylene (PTFE) frits. These cartridges are used in extraction of different types of pesticide residues (ametryn, prometryn, simazine, and simetryn) in water. The water samples were spiked and passed through the cartridges with aliquots of pesticides. Testing of the amounts of pesticides adsorbed on the cartridges. The impact of temperature, sample quantity, flow rate, pH and ionic strength on cartridge performance was verified. Results of fortified sample assessment were contrasted with information collected from commercially accessible C18 cartridges for sample volume. The Liquid Chromatography Electrospray Ionization Tandem Mass Spectroscopy (LC-ESI-MS/MS) method involves the simultaneous determination of four herbicides in multiple reactions monitoring (MRM) mode and the detection limit is 0.005–0.025 μg/mL and the quantification limit is 0.01 μg/mL.
Published Version
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