Abstract
A spectrophotometric method is described for the microdetermination of aluminum in acidic medium (pH 5.0) with the title compound. Spectrophotometric studies show the formation of 1:1 (ligand:A1) water-soluble complex and the reaction is suitable for photometric determination of 0.5–3.5 ppm of aluminum. Beryllium does not react with this reagent and aluminum can be determined in the presence of 100-fold quantity of beryllium. The molar absorptivity of the complex at 375 mμ is ε ~ 12,700 and the apparent formation constant at pH 5.0 is of the order of 10 6. The interference due to a number of ions has been studied.
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