Liquid-liquid extraction and spectrophotometric determination of zinc

A liquid--liquid extraction and spectrophotometric method is described for the determination of trace amounts of zinc. Zinc is extracted at p H 8.0 with N-phenylcinnamohydroxamic acid and with stearylamine and determined spectrophotometrically after the addition of 1-(2-pyridylazo)-2-naphthol. Beer&...

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Bibliographic Details
Published in:Analyst (London) 1985-01, Vol.110 (7), p.815-817
Main Authors: AGRAWAL, Y, DESAI, T. A
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Spectrometric and optical methods
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Summary:A liquid--liquid extraction and spectrophotometric method is described for the determination of trace amounts of zinc. Zinc is extracted at p H 8.0 with N-phenylcinnamohydroxamic acid and with stearylamine and determined spectrophotometrically after the addition of 1-(2-pyridylazo)-2-naphthol. Beer's law is obeyed over the range 0.05-1.92 ppm at 550 nm and 0.04-1.90 ppm at 550 nm with molar absorptivities of 5 x 10 exp 4 and 5.8 x 10 exp 4 l/mol cm, respectively. The effects of diverse ions are discussed. The method was applied to the determination of zinc in high-purity alloy samples. 27 ref.--AA
ISSN:0003-2654
1364-5528
DOI:10.1039/AN9851000815