Electrochemical determination of 5-dodecylsalicylaldoxime and 2-hydroxy-5-nonylacetophenoneoxime in commercial extractants

María P. Elizalde, María del Sol Rúa, Marta Huebra, Begoña Menoyo

Abstract


A differential pulse voltammetric method using a hanging mercury drop electrode (HMDE) has been optimized for the determination of 5-dodecylsalicylaldoxime in hydroalcoholic solutions using factorial and central composite designs. Taguchi design methodology has been used in order to extend the former optimized method to the determination of 2-hydroxy-5-nonylacetophenoneoxime. The method has been successfully applied to quantify 5-dodecylsalicylaldoxime and 2-hydroxy-5-nonylacetophenoneoxime in samples of commercial extractants over the concentration range 0.05-2.45 and 0.07-0.82 mg L-1, respectively, with detection limits of 0.034 mg L-1 and 0.019 mg L-1, respectively.


Keywords


voltammetry; hydroxyoxime-based extractants; factorial design

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DOI: http://dx.doi.org/10.2298/JSC160707005E

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