Collect. Czech. Chem. Commun. 1988, 53, 756-762

Determination of gallium in aluminium compounds by atomic absorption spectrometry

Věnceslava Tokarová and Josef Mareček

Chemopetrol, Research Institute of Inorganic Chemistry, 400 60 Ústí nad Labem


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.