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A rapid, simple, sensitive and selective new spectrophotometric kinetic method for Ni(II) traces determination at room temperature was elaborated in this paper. It is based on the catalytic effect of nickel ions upon the oxidation of alizarine (AL) by hydrogen peroxide in borate buffer (BUF) solution. The method was confirmed by determination of Ni(II) traces in fresh water samples. The obtained results were compared to those obtained by ICP-OES method and good agreement of the results was found.

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Analytical application of the reaction system alizarine-hydrogen peroxide in borate buffer media for the spectrophotometric kinetic determination of Ni(II)