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Potentiometric determination of vanadiumIV with ceriumIV sulphate at room temperature: Simultaneous differential potentiometric titration of ironII and vanadiumIV at room temperature |
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| Affiliation: | 1. Department of Conservation Ecology and Entomology and Centre for Invasion Biology, Stellenbosch University, Private Bag x1, Matieland, 7602, South Africa;2. South African National Biodiversity Institute, Private Bag x101, Pretoria 0001, South Africa;3. Department of Botany and Zoology, Stellenbosch University, Private Bag x1, Matieland, 7602, South Africa |
| Abstract: | The use of orthophosphoric acid as a catalyst has enabled the potentiometric titration of vanadiumIV to be carried out with ceriumIV sulphate in 1.0–2.0N sulphuric acid medium at room temperature. Using the same catalyst a method has also been developed for the simultaneous differential potentiometric titration of ironII and vanadiumIV with ceriumIV sulphate in a sulphuric acid medium; this method is more satisfactory than the procedure described by Furman1 because the first potential break is quite marked and it is more convenient because it avoids the high temperature required for the second stage of the titration in the Furman procedure. ChromiumIII and ironIII do not interfere in these titrations. |
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