The paper describes a method of radioactivation analysis for the determination of indium, copper and nickel. In the determination
of indium, ordinary and displacement substoichiometries were applied for glassmaking materials while ordinary substoichiometry
was applied for NBS standard reference materials. Copper and nickel in glassmaking materials and NBS standard reference materials
were also determined by the displacement and ordinary substoichiometries. Indium contents in glassmaking materials by the
two methods agreed with each other. The analytical results of indium, copper and nickel in NBS' SRM were also in good agreement
with published values and certified values by NBS.