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Simultaneous Spectrophotometric Determination of Iron, Titanium, and Aluminum by Partial Least-Squares Calibration Method in Micellar Medium

Abstract Simultaneous spectrophotometric determination of iron, titanium and aluminum was carried out using their morin (3,5,7,2′,4′-penta hydroxy flavone) complexes in Triton X-100 micellar medium. Partial least-squares regression was employed for the resolution of ternary mixtures of Fe, Ti, and Al. The presence of Triton X-100 micellar system avoids the solvent extraction step necessary for the formation of soluble morin complexes. The limits of detection obtained for Fe (III), Ti (IV), and for Al (III) were 0.03, 0.04, and 0.02 µg mL−1, respectively. The relative standard error for applying the method to the analysis of 20 synthetic samples in the concentration ranges of 0.03 to 1.0 µg mL−1 Al (III), 0.06 to 1.6 µg mL−1 Ti (IV), and 0.04 to 1.5 µg mL−1 Fe (III) was 5%. Analysis of synthetic and artificial mixtures of solutions of several alloys was successfully performed by the method.