Ajuste no lineal de técnicas electroquímicas

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Carlos Cevallos-Morillo

Resumen

El análisis de datos experimentales mediante ajuste no lineal es poco común, quizá una de las causas es que se requiere de programas especializados con licencias como Zview® o DigiElch.  Para la determinación de parámetros cinéticos, termodinámicos de un sistema redox y de una celda en estudio, se usan técnicas electroquímicas. El ajuste no lineal de técnicas electroquímicas como voltamperometría cíclica y cronoamperometría se puede realizar en una hoja de cálculo de Microsoft Excel empleando el complemento Solver. En este artículo se utilizó el programa Solver para ajustar registros electroquímicos experimentales presentando dos ejemplos donde se determinaron los valores del área de un electrodo de oro y la constante heterogénea de transferencia electrónica estándar del hexacianoferrato(III) de potasio sobre un ultramicroelectrodo de platino.

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