Abstract
An effective strategy for circumventing problems of interference by electroactive species during the detection of hexacyano- ferrate at the carbon paste electrode (CPE) is described. The concept relies on the incorporation of octadecylamine within the carbon paste. The electrochemical characterization of the modified electrode (potential range, background current, stability, permslectivity) has been investigated by amperometry and linear scan and cyclic voltammetry in aqueous media with different ionic strengths and in hydroalcoholic media. The interference of analytes such as ascorbic acid, uric acid, and dopamine can be eliminated totally by appropriate adjustment of the amount of octadecylamine within the carbon paste matrix
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