Oxidations with potassium permanganate in the presence of fluoride |
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Authors: | I M Issa and M Hamdy |
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Institution: | (1) Chem. Department, Fac. Science, Cairo University and Assiut Univ., Assiut, Egypt UAR |
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Abstract: | Summary Quadrivalent selenium can be determined with fair accuracy by mixing with an excess of KMnO4 in the presence of 25–75 ml of 2% NaF solution and 4–7 ml of 9 N sulfuric acid. After leaving the reaction mixture for 10–30 minutes the excess KMnO4 is estimated by one of the following procedures: A) Titration of the excess KMnO4 with monovalent mercury, B) Adding an excess of Hg2
2+ solution to react with the excess KMnO4 followed by titrating the excess mercurous with KMnO4 solution.Part I: Issa, I. M., and M. Hamdy, Z. analyt. Chem. 172, 94 (1980). |
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