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

Simultaneous determination of nickel(II) and cobalt(II) by spectrophotometry

J. Trúchly and T. Šramko

Department of Inorganic Chemistry, Slovak Technical University, Bratislava

Abstract: A spectrophotometry method of simultaneous determination of nickel and cobalt in aqueous solution has been developed. The method is based on colouring the respective cations by ammoniacal solution of sodium hydrosulfite. It was applied mainly to the weight ratio of Ni^II Co^II = 20 : 1 usual in industrial processing of nickel ores. This method allows a rapid, simple and sufficiently accurate determination of Ni11 and Co^II simultaneously, in the same solution, simply by changing the filters of the usual spectrophotometric apparatus. Most suitable for this purpose has prooved a photo-cell spectrophotometer, with at least four colour filters. The determination itself takes about one hour. The course of analysis being well arranged, this method allows to determine the  Ni^II and Co^II  contents of 25 — 30 samples in about 8 hours.

Full paper in Portable Document Format: 1910a767.pdf (in Slovak)

Chemical Papers 19 (10) 767–773 (1965)