Polarographic studies with the dropping mercury kathode. Part XXV. Increased sensitivity of micro-analytical estimations by a compensation of current

With the Drop of Mercury to the Nobel Prize

“…Presence of this current limits the sensitivity of the simple (d.c.) polarographic method. The first attempt to minimize its ef fect was carried out by Ilkovič and Semerano (34) . The dissemination of the knowledge of polarography in the thir ties was in particular influenced by two publications in book form by Heyrovský and by his two trips abroad.…”

Capillary Behavior in High Sensitivity Polarography

“…Under such circumstances, the instrumental sensitivity cannot be increased unless recourse is first made to some type of compensation circuit to balance out the charging current. Since the charging current over a limited potential span roughly approximates a linear function of Udme, compensation can be made by applying to the measuring circuit a current increasing at the same rate but of opposite polarity (5). The polarographic instrument used in this work has a linear compensator circuit (8, 9).…”

Controlled-Potential Polarographic Polarizing Unit with Electronic Scan and Linear Residual Current Compensation

“…To make available most of the recorder scale for the diffusion current, the counter current compensation method of Ilkovic and Semerano (2) is applied in the linear compensator. A current of opposite sign, increasing at a selected constant rate, is applied to the input terminal of the current amplifier.…”