Chromium speciation by column chromatography using a direct current plasma atomic emission spectrometer
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 115 (3) , 287-289
- https://doi.org/10.1039/an9901500287
Abstract
A simple and convenient method has been developed for the separation of CrIII and CrVI in synthetic aqueous solutions on an alumina column (10.0 × 4.0 mm i.d.) attached directly to a direct current plasma atomic emission spectrometer. The readings recorded on an x–y plotter demonstrate that both species of Cr can be retained on the column and then eluted with 0.02 M HNO3(CrIII) and 1.0 M ammonia solution (CrVI). Low concentrations of Cr can also be detected after separation with the proposed method by passing larger sample volumes through the column. A study of the effect of pH showed that the best separation was achieved between pH 3.0 and 5.5.Keywords
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