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An enzymatic amperometric procedure for measurement of chromium(III), based on the inhibitive action of this metal on tyrosinase enzyme activity, was developed for this purpose. A glassy carbon electrode was used as a support for the electropolymerisation of a polypyrrole (PPy) film, in which tyrosinase was immobilised. The parameters were optimised using experimental design methodology. To determine...
A procedure for the determination of the contaminant metal In(III) by differential pulse adsorptive stripping voltammetry (DPAdSV) using ammonium pyrrolidine dithiocarbamate (APDC) as a complexing agent, has been optimized. The selection of the experimental conditions was made using experimental design methodology by means of a robust regression method which allows the elimination of anomalous points...
A procedure for the determination of gallium by differential pulse adsorptive stripping voltammetry (DPADSV), using different complexing agents (ammonium pyrrolidine dithiocarbamate (APDC), pyrocatechol violet (PCV) and diethyldithiocarbamate (DDTC)), has been optimized. The selection of the experimental conditions was made using experimental design methodology. Under these conditions, the calibration...
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