Journal of the Metal Finishing Society of Japan
Online ISSN : 1884-3395
Print ISSN : 0026-0614
ISSN-L : 0026-0614
Determination of Sulfonic Acid Sodium Salt and Sulfonamide in Bright Nickel Bath by Phosphoric Acid-Potassium Permanganate Decomposition Method
Kazuo HASEGAWA
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1961 Volume 12 Issue 2 Pages 59-62

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Abstract
By oxidation of solution of phosphoric acid and potassium permanganate in hot condition, sulfonic acid sodium salt and sulfonamide are changed to SO4-- that precipitates as BaSO4, then sulfonic acid sodium salt and sulfonamide are determined by weighing of BaSO4.
At 180-200°C sulfonic acid sodium salt and sulfonamide are decomposed, and the end point of the decomposition is indicated by the change of the phase of solution's by which the quantity of sulfo-compounds in a bright nickel plating bath can easily and accurately be determined.
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