Abstract
Gallium and iron in aluminum metal were extracted with methyl isobutyl ketone from the solution of the specimen in 6N hydrochloric acid. Then, the both elements were determined by flame photometric method.
The extract was directly atomized into oxy-hydrogen flame (under the pressure of oxygen, 1.0kg/cm2 and of hydrogen, 0.1kg/cm2) and flame intensities were measured at 417.2mμ for gallium and at 372.0mμ for iron. The accuracy and precision of the results were examined with ALCOA standard samples and were proved satisfactory.
This procedure was rapider and simpler than other analytical methods such as fluorometric analysis and absorptiometrie method; and the lower limit of analysis was 0.0002% for both of gallium and iron.
