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Article
The Determination of Trace Levels of Aluminum by Differential Pulse Polarography
Analytica Chimica Acta
  • Geraldine S. P. Ritchie, University of Western Australia
  • Alan M. Posner, University of Western Australia
  • Ian M. Ritchie, University of Western Australia
Publication Date
1-1-1980
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 SO42- do not interfere.

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Citation Information
Geraldine S. P. Ritchie, Alan M. Posner and Ian M. Ritchie. "The Determination of Trace Levels of Aluminum by Differential Pulse Polarography" Analytica Chimica Acta Vol. 117 (1980) p. 233 - 239
Available at: http://works.bepress.com/gsritchi/35/