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V. M. Ivanov, T. O. Samarina, V. N. Figurovskaya
Investigation of
complex formation of nickel(II) with 1-nitroso-2-naphthol-3,6-disulfonic acid
optical and chromaticity methods
Abstract
Optimal conditions of complexation nickel(II)
with 1-nitroso-2-naphthol-3,6-disulfonic acid were found by spectrophotometric
method. An optimum interval pH formation of a complex 7,2–8,8 with
stoichiometrical ratio Me:R = 1–2. The five-multiple surplus reagent suffices
for quantitative formation of a complex. Molar coefficient of absorption and
characteristics of chromaticity of a complex in an interval concentration of
nickel (4,08–16,35)´10–5 M are
determined. Molar coefficient of absorption is equal (7,52 ± 0,05)´103
(n = 10, P = 0,95), B [(1,83±0,04)´105]
and G [(1,76 ± 0,05)´105] (n
= 9, P = 0,95) are the most sensitive functions of chromaticity.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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