Polarographic studies with the dropping mercury kathode. Part XLIV. The dependence of limiting currents on the diffusion constant, on the rate of dropping and on the size of drops

Application of the Ilkovic equation to quantitative polarography

“…Cadmi.um thus appears to play the role of a suppresser. This is confirmed by the results given in table 1 The mixture of cadmium and thallium is of particular interest because of the information it yields regarding the general resolving power of the method of analysis. In the polarograms for this mixture without gelatin, the thallium wave is regular and well defined over the entire drop-time range.…”

“…an inexhaustible supply in the surrounding solution to the surface of the electrode at which the concentration is zero because the ions are removed as rapidly as they arrive. The expression relating this diffusion current to the constants of the system under investigation was derived by Ilkovic [1]1 in the form where ia is the diffusion current in microamperes, n is the number of electron equivalents per mole of electrode reaction, D is the diffusion coefficient of the reducible (or oxidizable) substance, 0 is its concentration in millimoles per liter, m is the mass flow of mercury from the dropping electrode in milligrams per second, t is the drop-time in seconds, and k is a proportionality constant. In this equation the quantity knD l /2 is a constant for the particular ion under investigation, whereas the other factor depends upon the concentration of the solution and the physical constants of the apparatus employed.…”

Extraction kinetics of copper with benzoylacetone during drop formation.

“…, Ks (3) CuR+^+R^.^CuR^.y K, (4) CuR2(aq.)^CuR2(org.) Kb (5) In these equations, HR denotes the benzoylacetone.…”

History of trace analysis

“…Electrolytic techniques shifted away from classical polarography to other microelectrode techniques. Several reasons for this shift of emphasis can be traced in retrospect: (a) While diffusion theory to the dropping electrode was understood relatively early (Ilkovic, 1934) [43], many phenomena related to electrode kinetics remained ill-understood until Koutecky in 1953 [44] showed the complex relationship between diffusion and kinetics at the dropping electrode. (b) Instrumentation for current-time-potential measurements was primitive until the 1940s and later.…”