A potentiometric acid-base titration method has been proposed for anal
yzing proxamine-385 in tinning baths; for analysis, the solution is pr
econcentrated and the SAS is separated from sulfaminic acid salts, tin
sulfate, and other inorganic compounds. Sulfaminic acid is analyzed b
y potentiometric titration with a sodium nitrite solution after the in
terfering tin sulfate has been oxidized with a potassium permanganate
solution.