Abstract
AbstractThe effect of different concentrations of supporting electrolytes, either KNO3, NaNO3 or Ca(NO3)2, on the response of a spectroelectrochemical sensor was examined using [Ru(bpy)3]2+ as the analyte. The sensor consisted of an indium tin oxide (ITO) optically transparent electrode (OTE) coated with a thin film of either Nafion or SSEBS (sulfonated polystyrene‐block‐poly(ethylene‐ran‐butylene)‐block polystyrene) and used attenuated total reflection absorbance for optical detection and cyclic voltammetry for electrochemical detection. The practical implication of these results is the need to take into account the effect of ionic strength of the sample when using a spectroelectrochemical sensor of this type for quantitative analysis.
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