alexa Ion-exchanger colorimetry-I Micro determination of chromium, iron, copper and cobalt in water.
Pharmaceutical Sciences

Pharmaceutical Sciences

Pharmaceutica Analytica Acta

Author(s): Yoshimura K, Waki H, Ohashi S

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Abstract A new sensitive, colorimetric method based on the direct measurement of light-absorption by an ion-exchange resin phase, which has sorbed the sample complex species, has been developed. Determinations ofchromium(VI) with diphenylearbazide, iron(II) with 1,10-phenanthroline, copper with Zincon and cobalt with thiocyanate have more than ten times the sensitivity obtainable with conventional solution colorimetry. The present method can be applied to natural water samples containing very low levels of these metals.
This article was published in Talanta and referenced in Pharmaceutica Analytica Acta

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