Masking of iron with fluoride in the extractive atomic-absorption spectrometric determination of chromium in steel |
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| Authors: | Fogg A G Soleymanloo S Burns D T |
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| Institution: | Chemistry Department, University of Technology, Loughborough, Leics., U.K. |
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| Abstract: | Chromium in steel is determined by oxidation to dichromate, extraction into methyl isobutyl ketone from 1-3 M hydrochloric acid, and atomic-absorption measurements on the extract. The interference of iron in the atomic absorption is eliminated by using fluoride to keep the iron(III) in the aqueous phase in the extraction step. |
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