On the Anomalous Waves Observed on Normal Pulse Polarogramt

Abstract

The fundamental parameters which affect normal pulse 'polarographic wave have been investigated comparing with those of sampling DC polarography (tast polarography), and various phenomena observed in DC polarography migration current, maxima, kinetic wave and adsorption wave (prewave and postwave) have also been studied using normal pulse polarography.
Regardless of whether the reduction process is reversible or not, the limiting currents of normal pulse polarography for diffusion-controlled wave are about 2 to 6 times greater than those of tast polarography in the drop time range of 0.5 to 5 sec. On the other hand, in the case of formaldehyde kinetic wave, the wave heights of normal pulse polarography for cathodic and anodic scans are only about 10% higher than those of tast polarography over the drop time range used.
The migration current causes a round peak on the rising portion of the limiting current on normal pulse potarogram.
The "negative" maxima, which are observed for the solution of 1 mmol/l of Zn (11) and Ni (II) in ammoniacal medium at the absence of maximum suppressor, cannot be found on normal pulse polarogram. However, the "positive" maxima, which are observed for Cu (II) wave and the first wave of oxygen, are found on both normal pulse and tast polarographic waves.