Abstract
An analytical method of Sn in high purity copper by A. C. polarography has been established, which is able to determine as little as 0.1ppm.
To the solution of sample dissolved in HNO3, manganese sulfate and potassium permanganate are added, and Sn is coprecipitated with manganese dioxide by boiling the solution. The precipitate is fused with ferrous sulfate by sodium peroxide and leached by water. On the leach liquor, as it is free from interfering ions, Sn is determined by A. C. polarography, after the addition of hydrochloric acid and gelatin.
