The use of the rotating pt-electrode at zero applied E.M.F. for the microdetermination of monovalent phosphorus in hypophosphorus acid or hypophosphite. | [Pakistan journal of scientific research • 1982]

Author(s):

1. A. M. Hammam: Faculty of Science, Assiut University Assiut, Egypt

2. K. A. Idriss: Faculty of Science, Assiut University Assiut, Egypt

3. Z. R. El-Komi: Faculty of Science, Assiut University Assiut, Egypt

Abstract:

An amperometric method is described for the microdetermination of monovalent phosphorus using the rotating Pt-electrode vs S.C.E. and zero applied e.m.f. It is based on oxidation of hypophosphorus acid and hypophosphite with KMnO4 to phosphorus acid and phosphite respectively under the following conditions: Acidity 0.05—0.6 and 0.2— 1.68 NH2 SO4 for H3P02 and NaH2 P02 respectively; NaF: 0.4-1.5%; amounts of P(1): 2.4µ g 2.1 Mg and 5.4 µ g-7.24 mg corresponding to hypophosphorus acid and hypophosphite respectively. The equivalence point is reproducible; the method is accurate and can be utilized at concentrations lower than that with potentiometric method.

Page(s): 49-53

DOI: DOI not available

Published: Journal: Pakistan journal of scientific research, Volume: 34, Issue: 1--2, Year: 1982

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