Abstract
Electrochemical detection in flow-injection systems has become increasingly popular. Scanning electrochemical methods of detection have received less attention. The use of rapid square-wave voltammetric detection for flow injection is described. Experimental considerations for the use of square-wave voltammetric detection are discussed. Results of the application of this combination are shown for dopamine in 0.28 M sulfuric acid, and for lead(II) and thallium(I) in 0.9 M nitric acid. A linear, recursive estimator known as the Kalman filter is used to resolve overlapping responses. Empirical models consisting of the square-wave voltammetric responses of single species are used. Results are shown for mixtures of lead(II) and thallium(I) in 0.9 M nitric acid.
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