Studies on Adsorptive Voltammetry for the Nickel (Ⅱ)-Thiosemicarbazide System

Abstract

Abstract: In a supporting electrolyte containing 0.025 mol/Lpotassium hydrogen phthalate, a sensitive adsorptive peak of Ni(Ⅱ)-TSCsystem at the Hg electrode was found.The mechanism of the peak was studied by chronocoulometry.The study shows that in the presence of TSCthe adsorption of Ni(Ⅱ) at the surface of Hg electrode is direct adsorption of Ni(Ⅱ)-TSCcomplex and the adsorbed species is Ni(Ⅱ)(TSC)₂²⁺.The detection limits are 1×10^-8 mol/Land 4×10^-9mol/Lby linear sweep adsorptive stripping voltammetry and differential pulse adsorptive stripping voltammetry, respectively.

Key words: Nickel, Thiosemicarbazide, Chronocoulometry, Adsorptive voltammetry

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Hu Naifei, Li Qilong . Studies on Adsorptive Voltammetry for the Nickel (Ⅱ)-Thiosemicarbazide System[J]. Chem. J. Chinese Universities, 1989, 10(8): 796.

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Studies on Adsorptive Voltammetry for the Nickel (Ⅱ)-Thiosemicarbazide System

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