Positive feedback compensation of iR-drop in modified normal pulse polarography of sodium ion in acid solution.
The well-defined polarographic wave for sodium, obtained by modified normal pulse polarography in which the polarographic current is sampled after the fall of each pulse, shifts to more negative potentials with decrease in the pH of the solution. The shift is attributed to the effect of the uncompensated resistance of the sample solution, and can be compensated by a positive feedback circuit.
Hara
M
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Faculty of Education, Toyama University, 3190 Gofuku Toyama-shi, Toyama 930, Japan.