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Optimal conditions of complexation copper(II) with 1-nitroso-2-naphtol-3,6-disulfonic acid were found by the spectrophotometric method. The optimum pH interval for the formation of a complex is 6.5–7.9. A tenfold surplus of the reagent suffices for the quantitative formation of a complex. The chemical and analytical characteristics of a complex in an interval concentration of copper (1.26–6.39) × 10 −5 M are determined. The molar coefficient of absorption of a complex is (1.21 ± 0.01) × 10 4 ( n = 5, P = 0.95). The function and molar coefficient of chromaticity are determined. The most sensitive functions are Z [(2.58 ± 0.04) × 10 5 ] and G [(3.88 ± 0.06) × 10 5 ] ( n = 5, P = 0.95).
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Иванов et al. (2010) studied this question.
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