Current-time characteristics of the rapidly dropping mercury electrode

✍ Scribed by Reita Tamamushi; Sunao Momiyama; Nobuyuki Tanaka

• Publisher: Elsevier Science
• Year: 1960
• Tongue: English
• Weight: 387 KB
• Volume: 23
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(60)80132-8

✦ Synopsis

Dropping mercury electrodes (DME) with short drop times have been considered unsuitable as indicator electrode in polarography because of the presence of the maximum of the second kind owing to the "Sptileffekt"l ; only a few papers on such an electrode have been published 2. KooNs studied the properties of the DME with a normal rate of mercury flow but a very short drop time under the high pressure applied to the electrode 3. Recently, KARCHMER carried out a systematic investigation on DMEs with a short drop time and used the electrode for the polarographic determination of dissolved oxygen in natural and effluent waters~. In previous papers 5,6, the present authors have pointed out that the rapidly dropping mercury electrode (RADME), whose drop time is less than I sec, seems to be one of the most suitable indicator electrodes in alternating current (a.c.) polarography. It was also shown in direct current (d.c.) polarography that, in the presence of a sufficient amount of surfaceactive substances (SAS), the maximum of the second kind seems to be completely suppressed and current-voltage curves similar to those at the conventional DME are observed at the RADME 6. In this paper, the characteristics of the RADME in stationary and flowing media are investigated by measurements of the current-time curves during the life of a mercury drop.