Analyses of aluminum traces in sorted amber cullet

Abstract

This paper deals with analyses of aluminum impurities in already sorted cullet. Some ways of minimizing the amount of pure aluminum in this amber cullet are shown and discussed. By the mechanism presented the aluminum is oxidized with an alkaline Solution at pH 7.5 up to 11.5, as found in outside stored cullet. This proves to be a useful way of minimizing metallic aluminum in cullet and reduction of interfering inclusions in glasses.