VOLTAMMETRY IN A SULFUR AND IRON-CONTAINING SODA-LIME-SILICA GLASS MELT

With the aid of square-wave voltammetry soda-lime-silica melts with su lfate fining were investigated in order to enable a quantitative in-si tu determination of sulfur and iron. In this study, glass melts with l ow iron and high sulfate contents, typical for technical white glasses , were examined. The current-potential curves are predominantly influe nced by sulfur and not solely controlled by diffusion. This behavior i s supposedly caused by deposition of a sulfur layer on the surface of the working electrode. However, a simultaneous quantitative in-situ de termination of iron and sulfur in melts of white glasses is possible.