Direct and Titrimetric Determination of Hydroxide Using Normal Pulse Polarography at Mercury Electrodes

Emilia Kirowa-Eisner, Janet Osteryoung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

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 languageEnglish
Pages (from-to)1062-1066
Number of pages5
JournalAnalytical Chemistry
Volume50
Issue number8
DOIs
StatePublished - 1978

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