One of the advantages of polarographic analysis is that, when a mixture of two or more substances is electrolyzed at a dropping electrode in the presence of an excess of supporting electrolyte, each substance will produce its own wave at a characteristic potential and the height of the wave will be proportional to its concentration. However, in the absence of a supporting electrolyte, the wave height for cations being reduced at the dropping electrode is dependent on the presence of another reducible substance. Heyrovsky and Bures (1), (2) first demonstrated that the limiting currents of potassium and sodium ions are increased or exalted by the preceding discharge of oxygen. Lingane and Kolthoff (3) also found a similar effect of thallous ions on the current-voltage curve of potassium ions. In a quantitative discussion of exaltation, Lingane and Kolthoff (3) assumed that the diffusion component of the limiting current is independent of the preceding discharge of a substance, and that it is only the migration component of the limiting current which is exalted.
Proceedings of the Iowa Academy of Science
© Copyright 1944 by the Iowa Academy of Science, Inc.
Takazawa, Futoshi and Smith, Lothrop
"A Polarographic Study of Acetphenone and Benzalacetone,"
Proceedings of the Iowa Academy of Science, 51(1), 301-307.
Available at: https://scholarworks.uni.edu/pias/vol51/iss1/29