Tris(o-hydroxyphenyl)phosphine oxide as a colorimetric reagent for the determination of ferric iron |
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Authors: | MJ Holdoway JL Willans |
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Institution: | Chemistry Division, Atomic Energy Research Establishment, Harwell, BerksEngland |
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Abstract: | Tris(o-hydroxyphenyl)phosphine oxide is introduced as a new colorimetric reagent for the determination of ferric iron in solutions 0.3–2.5M nitric acid. The only other cation known to interfere in the determination is the ceric ion (Ce+4). The colour of the complex is stable and is found to obey Beer's law over a wide concentration range. |
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