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E-Journal of Chemistry
Volume 8 (2011), Issue 4, Pages 1528-1535

Flotation-Spectrophotometric Method for the Determination of Aluminium ion Using Xylenol Orange

F. Nekouei and Sh. Nekouei

Young Researchers Club, Department of Chemistry, College of Science, Islamic Azad University, Gachsaran Branch, Gachsaran, 75818-63876, Iran

Received 2 October 2010; Revised 2 December 2010; Accepted 16 December 2010

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A simple, fast, reproducible and sensitive method for the flotation- spectrophotometric determination of Al3+ is reported. The apparent molar absorptivity (ε) of the ion associate was determined to be 8.35×104 L mol-1 cm-1. The calibration curve was linear in the concentration range of 1.0-50 ng mL-1 of Al3+ with a correlation coefficient of 0.9997. The limit of detection (LOD) was 0.621 ng mL. The relative standard deviation (RSD) at 10 and 30 ng mL-1 of aluminium were 1.580 and 2.410% (n=7) respectively. The method was applied for measuring the amount of aluminium in water samples.