Selective Spectrophotometric Determination of Aluminium with Xylenol Orange in Acidic Media Using Partial Least Square Method

摘要

A simple selective and efficient analytical method for the determination of aluminium in water and real samples is proposed. The procedure is based on the reaction of aluminium ion with xylenol orange in acidic media prior to its spectrophotometric determination using partial least squares (PLS) method. A set of 20 calibration samples was employed to build the model At the best modeling conditions, the SEC were 0.0256 and 0.0148 and the REP were 4.45 and 2.58 % for calibration and prediction set, respectively. The mean recoveries and relative standard deviations (RSD) for aluminium prediction by PLS-1 were found to be 100.58 ± 2.99 (n = 6). Finally, quantitative determination of aluminium in natural water samples and aluminium gel tablets and bauxite and bentonit samples were examined for aluminium content successfully by the proposed method.