OPTIMUM KINETIC CONDITIONS FOR THE INDICATOR REACTIONS AG O-2/CO2+ AND AG/O-2/CO2+/CN- - THEORETICAL AND EXPERIMENTAL ASPECTS/

By means of a LCCA-type amperometric sensor for oxygen, the studies de aling with the gallic-acid (AG)/Oxygen indicator reaction have been ex tended, aiming at the establishment of a set of optimum conditions on: the sensor response time, pH, AG concentration, catalytic action of t he Co ions and inhibitory influence of the CN ions. All these data hav e been determined in two different pH media, namely: sodium berate buf fer and ammoniacal 'buffer solutions. The importance of the study is b oth theoretical and practical - if considering the chemical analysis o f Co and CN ions, at the level of traces.