ELECTROCHEMICAL ION CHROMATOGRAPHY USING THE POLYANILINE STATIONARY-PHASE

We report here on electrochemical ion chromatography using glassy carb on powders modified with polyaniline. Separation in this technique is based on the insertion of anions into a polymer film in its oxidized s tates. Thus, the separation of anions can be controlled by changing th e potential of the film electrochemically; the retention time of the a nions increased with an increase in the potential. Separation was opti mized by changing the pH of the mobile phase and column length.