AC oscillopolarographic determination of aluminum in natural and drinking waters using the adsorption of the Al(III)-1,2-dihydroxyanthraquinone-3-sulfonic acid complex

This paper presents a very simple and rapid method for determination of aluminum in natural and drinking waters by using a.c. oscillopolarographic adsorptive wave of the Al(III)-1,2-dihydroxyanthraquinone-3-sulfonic acid complex in a triethanolamine buffer solution of pH 7.6 at HMDE. A linear dependence between the incision height on dE/dt-E oscillogram and the aluminum concentration was obtained in the range from 5.10(-6) to 5.10(-5) mol l(-1). The detection limit is 1.10(-6) mol l(-1) and the relative standard deviation is 6.0% for 4.10(-5) mol l(-1) aluminum. This method has the distinct advantages of cheap instrumentation, simple and rapid manipulation and deaeration is unnecessary. It is especially suitable for the fast determination of aluminum in natural and drinking water samples.