2003 Volume 52 Issue 9 Pages 701-705
We studied the fabrication of a new centrifugal liquid membrane (CLM) cell with two electrodes, which can be used in electro-spectrochemical measurements for liquid/liquid two-phase systems. Two fabrication methods for preparing the electrodes, the chemical plating of Au and the sticking of Pt foils (width 5 mm, thickness 20 μm) on the inner surface of the CLM cell, were examined. It was elucidated that a CLM cell with Pt foils worked well as an electrochemical cell. To evaluate the CLM-electrode system, the electrolytic reduction of water-soluble porphyrin (MnIIITPPS) was examined. A controlled-potential electrolysis was carried out while rotating the CLM cell, and the UV-visible spectra were recorded. The electrolytic reduction of MnIIITPPS was successfully observed as a change in the absorption spectrum. The spectral changes with electrolysis were observed under two conditions: with a single aqueous solution and an aqueous solution/n-dodecane two phase system. It is concluded that the new CLM cell with Pt electrodes has a good ability to perform electro-spectrochemical measurements for liquid/liquid two-phase systems.
