Title

The Determination of Trace Levels of Aluminum by Differential Pulse Polarography

Author Info

Geraldine S. P. Ritchie, University of Western AustraliaFollow
Alan M. Posner, University of Western Australia
Ian M. Ritchie, University of Western Australia

Recommended Citation

Postprint version. Published in Analytica Chimica Acta, Volume 117, January 1, 1980, pages 233-239.

NOTE: At the time of publication, the author Geraldine S.P. Ritchie was not yet affiliated with Cal Poly.

The definitive version is available at https://doi.org/10.1016/0003-2670(80)87022-X.

Abstract

The direct determination of aluminium in aqueous solutions by differential pulse polarography is described. If the pH is carefully controlled to 4.00 ± 0.01, there is a linear relationship between the peak height of the polarographic wave and the aluminium concentration up to 2.5 × 10^-5 mol dm^-3. The coefficient of variation is about 4% at the 10^-5 mol dm^-3 level. With increasing aluminium concentrations, the relationship ceases to be linear, and above 9 × 10^-5 mol dm^-3, the peak splits, probably because of hydrolysis and polymerisation. Na⁺, NH₄⁺, Mg²⁺ and Ca²⁺ interfere at levels 100 times greater than that of the aluminium whereas Fe²⁺, Fe³⁺, Cu²⁺, Zn²⁺, Ni²⁺, NO₃^-, ClO₄^-, Cl^- and SO₄^2- do not interfere.

Disciplines

Food Science | Nutrition

Copyright

1980 Elsevier.