DIRECT DETERMINATION OF ALUMINUM IN DRINKING AND NATURAL WATERS AS 8-HYDROXYQUINOLINE CHELATE BY RP-HPLC

Abstract

Determination of trace aluminum in the form of 8-hydoxyl-quinoline chelate by reversed phase high performance liquid chromatography and spectrophotometric detection is described in this paper. The optimization of the experimental conditions including precolumn complexation, chromatographic separation, and detection wavelength is comprehensively investigated. The response is linear from 0.002 to 0.3 μg/mL with a detection limit of 0.002 μg/mL. The relative standard deviation is 3.6% at an Al concentration of 0.2 μg/mL. The reliability of the entirely optimized procedure is confirmed by the direct analyses performed on ten real drinking and natural water samples.

Keywords:

• Aluminum
• 8-Hydroxyquinoline
• Chelation
• Drinking water
• Natural water
• HPLC

ACKNOWLEDGMENTS

This project is supported by the National Natural Science Foundation of China (No. 29777013) and the Analysis & Test Fund of Center of Materials Analysis, Nanjing University.