Extractive spectrophotoretric determination of chromium(III) with 1-(2-pyridylazo)-2-naphthol.
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概要
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1-(2-Pyridylazo)-2-naphthol reacts with chromium(III), on heating at 80–90 °C for 35 min, at a pH of 3.2–3.7 in presence of acetate buffer. The reddishbrown chelate, extracted into 1-butanol, has two absorption maxima at 555 and 600 nm of equal intensity. The complex obeys Beer's law in the range 0.3–2.0 μg/ml, has molar absorptivity 1.28×10<SUP>4</SUP> at 555 nm.
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著者
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Eshwar M.
Department of Chemistry, Indian Institute of Technology
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Subrahmanyam B.
Department of Chemistry, Indian Institute of Technology