Topic
Polarography
About: Polarography is a research topic. Over the lifetime, 4772 publications have been published within this topic receiving 75478 citations.
Papers published on a yearly basis
Papers
More filters
105 citations
104 citations
TL;DR: In this article, a general theory of pulse polarographic current-potential curves is developed for a simple electrode reaction proceeding at the expanding plane electrode, where the ratio of the sampling time to the pre-electrolysis time is smaller than 1/30.
Abstract: A general theory of pulse polarographic current-potential curves is developed for a simple electrode reaction proceeding at the expanding plane electrode. It is shown that when the ratio of the sampling time to the pre-electrolysis time is smaller than 1/30, this condition being satisfied in usual pulse polarographic practice, the equation of current-potential curves can be greatly simplified. The theory developed is applied to the three modes of pulse polarography nowadays practically employed, i.e., normal pulse, scan-reversal pulse and differential pulse polarography. For each mode, the dependence of current-potential curves on the kinetic parameters of electrode reaction as well as on the experimental variables is discussed.
104 citations
TL;DR: In this paper, the standard potential of the O 2 −0.270 V/NHE system has been determined by comparing the data obtained by pulse polarography and reoxidation chronocoulometry.
102 citations
TL;DR: It was possible by using these methods to work with lower DNA concentrations and to measure at lower pH, and the dependences of limiting dc polarographic currents of denatured DNA onpH had S-shaped courses.
Abstract: The behaviour of denatured DNA was studied with the aid of classical (dc) polarography, alternating current polarography, oscillopolarography and pulse-polarography. The dependences of limiting dc polarographic currents of denatured DNA onpH had S-shaped courses. The curves of S-shaped dependences shifted to variouspH according to the concentration and to the type of salts of background electrolyte. In the regions ofpH, where the height of dc polarographic step almost did not change withpH, the limiting current had the character of diffusion controlled currents. At higherpH, when the drop of current occurred, the dc polarographic curves had a maximum form. The decrease of current and the appearance of the maximum-like curve is probably connected with adsorption/desorption processes which take place on the electrode at negative potentials. S-shaped course had even the dependence of the height of pulse-polarographic curves and the depths of an indentation on the oscillopolarograms dE/dt againstE on pH. In difference to the dc polarography, it was possible by using these methods to work with lower DNA concentrations and to measure at lower pH.
102 citations