3.3. Application
The procedure proposed was applied for the determination of gallium
in five bauxite samples. Table 8 shows the results found using the
two reference elements. A statistical test demonstrates that there is no
significant difference between the results found using the two reference
elements (yttriumand scandium)employed for correction of the aluminum
interference.
The gallium concentrations found in these samples are in agreement
with those results reported by literature [11,21,22].