Abstract
The electrodic dissolution of mercury in the presence of hydroxide is a reversible electrode process with diffusion controlled current on the time scale 5-100 ms. Normal pulse polarography has been found suitable for direct determination of hydroxide ions in the concentration range 0.6µ-0.4 mM at the DME or rotating thin film mercury electrode (glassy carbon substrate). The system is suitable also for fast and accurate amperometric acid-base titrations at low concentrations (3 µM-0.4 mM). The response time of the indicator system is 0.5 s or less and is independent of concentration of the titrated acid or base or of the progress of the titration.
| Original language | English |
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| Pages (from-to) | 1062-1066 |
| Number of pages | 5 |
| Journal | Analytical Chemistry |
| Volume | 50 |
| Issue number | 8 |
| DOIs | |
| State | Published - 1978 |