Determination of Ni(II) by carbon past electrode modified with clinoptilolite nanoparticles-dimethyl glyoxime (NClino-DMG)

Clinoptilolite was pretreated by mechanical ball-mill method to obtain nanoparticles and it was modified by DMG. The raw and modified samples were characterized by XRD, FT-IR, SEM, BET, TG-DTG and energy dispersive analysis X-ray spectroscopy (EDX). The modified Clinoptilolite nano-particles with DMG (NClino-DMG) were used for the modification of carbon paste electrode (NClin-DMG-CPE). The modified electrode was then used for voltammetric determination of Ni(II) in aqueous solution. To determine the interaction of experimental parameters, response surface methodology (RSM) was used. The effects of some key operating parameters such as: zeolite particle size, nature and concentration of the supporting electrolytes, pH of solution, electrode ingredients and potential scan rate on the voltammetric behavior of the modified electrode were studied.