Titration of Molten Soda Lime Silicate Glasses by Square Wave Voltammetry

This paper relates attempts to use square wave voltammetry (SWV) for the analysis of certain additive in molten silicate glasses. Iron, sulfur, and chromium oxides were investigated; first, individual studies of the compounds allowed us to identify the peak potential for each element at each oxidation state and to correlate the peak currents with e species. Then, with industrial melts, the resulting signal was deconvoluted into single peaks for identification. SWV proved to be a powerful analysis tool in the glass making industry. The glass industry is constantly looking for ways to monitor the composition of molten glasses used in manu-facturing processes as they leave the fusion bath. The tem-perature at that point is between 1100 and 1300 ~ and the glass is therefore a viscous liquid. It contains quantities of polyvalent ionized species at low concentrations (less than 1 % of the mass). These species come from refining agents such as sulfate ions and coloring agents like iron and chromium oxides