• Comparative studies of alternating and direct current polarography: Effect of concentration

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      https://www.ias.ac.in/article/fulltext/seca/044/01/0026-0035

    • Keywords

       

      Polarography; Drop Mercury Electrode; Potassium Chloride Solution; Potential Width; Cadmium Sulphate

    • Abstract

       

      Alternating and direct current polarograms of Cd++ at different concentrations in the range 0·1 to 10 mM were recorded using 0·1 M potassium chloride solution as the supporting electrolyte. While the diffusion current id in dc polarography increased linearly with concentrations up to 10 mM, the summit current is at - 0·62 volts vs. S.C.E. (the half-wave potential of Cd++) increased linearly up to 1 mM tending to saturate at larger concentrations. The potential width of the ac peaks was lower than the corresponding dc wave-spread indicating that analysis of a mixture of two components with their half-wave potentials close to each other, was possible in the ac polarography.

    • Author Affiliations

       

      N A Ramaiah1 S K D Agarwal1

      1. Department of Physical Chemistry, Indian Institute of Sugar Technology, Kanpur
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