A new reagent, 1-[(5-(3-nitrobenzyl)-1,3-thiazol-2-yl)diazenyl]naphthalen-2-ol, which is a derivative of 1-[(5-benzyl-1,3-thiazol-2-yl)diazenyl]naphthalene-2-ol, was proposed for the voltammetric determination of nickel(II). The voltammetric characteristics of aqueous-ethanolic solutions (50% v/v) of NBnTAN and this reagent in the presence of nickel(II) ions were investigated. Optimal conditions for the determination of nickel(II) using 1-[(5-(3-nitrobenzyl)-1,3-thiazol-2yl)diazenyl]naphthalen-2-ol on the background of sodium chloride at pH 7.0 (С min =1,3×10 -7 М) were determined. The selectivity of this technique with respect to related metal ions was investigated. Approbation was performed during the analysis of an aluminum-based alloy (A 1891).
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