Spectrophotometric determination of concentrations of Co (II) and Ni (II) in complex with 1- (2-pirydylazo) -2-naphthol in aqueous micellar medium

doi:10.26565/2220-637X-2014-24-19

Nataliia A. Leonova V.N. Karazin Kharkiv National University https://orcid.org/0000-0001-7904-8311
Oleg I. Yurchenko V.N. Karazin Kharkiv National University https://orcid.org/0000-0002-7117-4556
Anastasiia S. Batrak V.N. Karazin Kharkiv National University https://orcid.org/0000-0002-8331-7163

DOI: https://doi.org/10.26565/2220-637X-2014-24-19

Keywords: сobalt, nickel, 1-(2-pyridylazo)-2-naphthol, water-micellar media, standard addition method, linear least squares method, spectrophotometry

Abstract

The concentration of cobalt (II) and nickel (II) complexes with a 1-(2-pirydylazo)-2-naphthol in aqueous micellar medium containing sodium dodecyl bis(oksietylen)sulphate with a mass fraction ω = 2%. was calculated. Presented by applying computational methods such as the method of standard additions ("H-point standard addition method", HPSAM) and linear least squares method (LLSM) for simultaneous determination of cations. HPSAM allows to convert random error caused by the presence of interfering components, systematic discharge that can be assessed and was minimized.

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