Analytical Study of Zinc Sulphide Electrode Prepared from Nano material
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Abstract
Zinc Sulphide nanoparticles (NPs) has been prepared from raw material by microwave method. ZnS NPs were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), The size of ZnS NPs were about (3.15nm) calculated from the Scherer formula from the most intense XRD peak, The calculated product for ZnS was about 94.4%.Zn2+-selective electrode based on poly vinyl chloride (PVC) was prepared by using ZnS Nanoparticles (NPs) powders and di-butyl phthalate, and were compared The analytical specifications of ZnS NPs and ZnS Microparticles (Non- NPs ) electrode. ZnS NPs electrode and ZnS Non- NPs electrode give linear range upon (10-5-10-2)M and (10-4-10-2)M, Nernstain slope of (30.35 mV/decade) and (30.84 mV/decade), correlation coefficient of (0.9999) and (0.9995), detection limit of (1.733x10-7)M and (2.486x10-6)M, quantitative limit of (5.77x10-7)M and (7.07x10-6)M, the response time of (9-39) second and (13-36) second, respectively. The lifetime for each electrode was 15 days. The optimum conditions for each electrode were (5-7), (20-30 ̊C) and (10-4) M for pH, temperature and concentration of filling solution respectively. The selectivity of electrodes were measured using mixed solutions method, the results showed that the selectivity coefficient values for all interferences ions are less than one.
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