4. Conclusions
The aluminum interference on the determination of gallium by ICP
OES was studied and the results evidenced that it is a necessary
correction.
Yttrium and scandium were tested as reference elements and the
experiments proved that these elements are efficient for correction of
the aluminum interference.
The method proposed has precision, accuracy and limit of quantification
necessary for the determination of gallium in bauxite.
The method is very opportune considering, that the bauxite is the
principal ore for obtaining gallium.