ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Reaction of β-resorcylidenethiosemicarbazone and nickel(II) cations and its application for the gravimetric determination of nickel

S. Stankoviansky, J.Čársky, and A. Beňo

Institut für analytische Chemie der Naturwissenschaftlichen Fakultät an der Komenský-Universität, Bratislava 1

Abstract: The reaction between  β-resorcylidenethiosemicarbazone and nickel(II) salts in acidic medium was studied. The green, water insoluble nickel(II) salt of molecular formula (C₈H₈N₃0₂S)₂Ni • 6H₂O was isolated and analysed. It was found to be suitable for gravimetric determination of nickel. By the solubility determination of the salt at various pH it has been ascertained that at optimum pH conditions 5 — 6.5 and 20°C nickel can be determined in 0.1 — 0.5 mg/ml concentration. The determination with 5X10^-2м solution of the reagent in acetone is not disturbed by the presence of alkali metals or alkaline earth cations such as NH₄⁺, Tl⁺, Be²+, Mg²⁺, Mn(II), Zn(II), B(III), Cr(III), As(III, V), Bi(III) and Th(IV). The presence of Al(III) and Sb(III) is masked with sodium potassium tartrate. Ti(IV) and Zr(IV) is masked with NaF. The conversion ratio is 0.1000 and the determination error was found to be less than ± 0.5%.

Full paper in Portable Document Format: 238a589.pdf (in German)

Chemical Papers 23 (8) 589–596 (1969)