Some pyridylazo compounds as sensitive reagents for the spectrophotometric determination of nickel |
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| Authors: | K. Ohshita H. Wada G. Nakagawa |
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| Affiliation: | Laboratory of Chemistry, Daido Institute of Technology, Minami-ku, NagoyaJapan;Laboratory of Analytical Chemistry, Nagoya Institute of Technology, Showa-ku, NagoyaJapan |
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| Abstract: | Six 2-(2-pyridylazo)-5-alkoxyphenol derivatives were synthesized, and their application to the spectrophotometric determination of nickel was studied; 2-(2-pyridylazo)-5-methoxyphenol and the corresponding ethoxyphenol are very sensitive and selective. The molar absorptivity of the nickel chelate of the former is 11.3 × 104 l mol-1 cm-1. A solvent extraction procedure for the selective determination of 1–8 μg of nickel is described. |
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