Preliminary Investigation of Potemtometric Stripping Analysis at the Gel Stabilized Oil-Water Interface
No Thumbnail Available
Date
1993-01
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa Universty
Abstract
Potentiometric stripping analysis (PSA ) was applied
to the interface between two immiscible electrolyte solutions
( ITIES ). The analysis was done on anions of thiocyanate,
perchlorate and nitrate.
Polyvinylchloride-nitrobenzene (PVC-nb) gel was
prepared following the procedure introduced by Senda et al
jBunseki Kagaku, 33 (.1984) E 371] and the PVC-nb gel electrode
was constructed using polytetrafluoroethylene (PTFE)
tubing as a main cell body.
The behaviour of the cell was characterized by ac and
dc cyclic voltammetry and reproducible voltammograms were
obtained showing that the ion transport processes in both
phases is diffusion controlled. The reversibility of the
system was also tested using current reversal techniques.
The dependence of transition time (T ) on deposition
time and deposition Cor enrichment ) potentials was quali- tatively studied. From this preliminary study the method
(PSA ) was found to be quite applicable for the electrolysis
of ions across the ITIES,
Description
Keywords
Ptemtometric Stripping