Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

A method is suggested for the determination of gallium in aluminium oxide and in raw materials for its production (aluminium sulphates, alums) by atomic absorption spectrometry with electrothermal atomization, based on direct injection of a suspension of Al₂O₃ in an ethanol-water 9 : 1 mixture into a tungsten atomizer. Suspensions of Al₂O₃ with known amounts of Ga embedded in the solid phase are found to suit best for calibration. Optimum heat treatment and atomization conditions are established. The behaviour of gallium in aqueous solutions and in Al₂O₃ suspensions during their heat treatment is compared for atomization in a tungsten atomizer and in a graphite furnace.