Separation And Determination Of Lead And Barium Oxides In Glass Analysis.

Two methods of determining lead and barium in glasses are reviewed and investigated for use as controls in the works. These are:- separation and determination as sulphate using the different stabilities of their EDTA complexes in weakly acid solutions; separation as electro negative chloride complexes in an adsorption column with strongly alkaline ion exchanged. It is shown that only the ion exchange method is generally suitable in glass analysis. However, the first method is simpler and can be recommended for routine factory control of some types of glass.