Abstract
An analytical method of antimony in glass by the square-wave polarography has been presented in which the recommended procedure is as follows.
The powdered glass sample is decomposed with a mixture of hydrofluoric acid and oxalic acid. After driving off oxalic acid at 155°C, the residue is dissolved in 2N hydrochloric acid used as the supporting electrolyte, and square-wave polarogram is recorded from 0-0.3 V vs. Hg pool. A linear relationship exists between the wave height and the antimony concentration in the range 05×10-5 M Sb. Effects of coexisting ions are shown in Table I.
The method is applicable for various types of glass including lead and barium glasses.
The time necessary for an analysis is about 3 hours because chemical separation of antimony is unnecessary and determination can be carried out with a small amount of sample about 100mg.
