<b>New spectrophotometric method with KMnO<sub>4</sub> for determination of hypochlorite in commercial bleaches</b>
Hypochlorite with a strong germicidal and bleaching action forms the active component in most commercial bleaches. The new method, an instrument-based and simple experimental procedure involves the reaction of the hypochlorite with arsenious oxide (As<sub>2</sub>O<sub>3</sub>...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Chemical Society of Ethiopia
2005-06-01
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| Series: | Bulletin of the Chemical Society of Ethiopia |
| Subjects: | |
| Online Access: | http://www.ajol.info/index.php/bcse/article/view/21103 |
| Summary: | Hypochlorite with a strong germicidal and bleaching action forms the active component in most commercial bleaches. The new method, an instrument-based and simple experimental procedure involves the reaction of the hypochlorite with arsenious oxide (As<sub>2</sub>O<sub>3</sub>) (pH 6.5) followed by the coupled reaction of residual As<sub>2</sub>O<sub>3</sub> with permanganate at acidic pH. A titration procedure is described and spectrophotometric method is designed using four ranges of calibration curves to enable the determination of hypochlorite in the range 2.5 x 10<sup>-4</sup> to 2.4 x 10<sup>-2</sup> M from the KMnO<sub>4</sub> absorbance measurements. A series of commercial bleaches are tested using the proposed spectrophotometric method. The results proved more precise and accurate than by arsenite method. |
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| ISSN: | 1011-3924 1726-801X |