Voltammetric investigations in Na2SO4-refined soda-lime-silica glass melts

Abstract

The redox behavior of sulfate-refined soda-lime-silica glass melts was investigated by the aid of voltammetric methods. Here the possibilities for a quantitative in-situ determination of sulfur and iron are predominatly treated. Measurements in technical glass melts show that a determination of iron in melts with low sulfate and high iron concentration such as amber brown or green glass melts is easily possible. In contrast, there are problems at glass melts with low iron and high sulfate concentrations, because the current-potential curves are predominantly affected by sulfur compounds.