Spectrophotometric determination of cobalt(II) with thiocyanate. A modification for increasing sensitivity and selectivity.

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概要

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• The ion association complex formed between [Co(SCN)<SUB>4</SUB>]<SUP>2−</SUP> and 3,3′-(1,1′-biphenyl-4,4′-diyl)bis[2,5-diphenyl-2<I>H</I>-tetrazolium] dichloride, commercially known as neotetrazolium chloride, has been extracted into isobutyl methyl ketone and used for the photometric determination of 2.5–9.8 μg cm<SUP>−3</SUP> cobalt at pH 3.5–5.0 (acetate buffer). Sandell's sensitivity of the method (0.02 μg cm<SUP>−2</SUP>) is better than most of the other thiocyanate methods known so far. Interference of diverse ions has been studied. Using the higher tolerances of anions, many cations interfering in the other thiocyanate methods have been masked, thus making the present procedure more selective. The method has been applied to wire alloys.

• 公益社団法人 日本化学会の論文

著者

• Kumar Dinesh

  Department Of Chemistry Indian Institute Of Technology

• Singh Ajai

  Department of Chemistry, Indian Institute of Technology

• Katyal Mohan

  Department of Chemistry, Indian Institute of Technology

関連論文

• EXTRACTION SPECTROPHOTOMETRIC DETERMINATION OF COPPER IN ALLOYS AND BIOLOGICAL SAMPLES WITH PYRIMIDINE-2-THIOL
• Spectrophotometric determination of cobalt(II) with thiocyanate. A modification for increasing sensitivity and selectivity.

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