Electrochemical determination of 5-dodecylsalicylaldoxime and 2′-hydroxy-5′-nonylacetophenone oxime in commercial extractants

Abstract

A differential pulse voltammetric method using a hanging mercury drop electrode (HMDE) was optimized for the determination of 5-dodecylsalicylaldoxime in hydro-alcoholic solutions using factorial and central composite designs. The Taguchi design methodology was used to extend the formerly optimized method to the determination of 2′-hydroxy-5′-nonylacetophenone oxime. The method was successfully applied to quantify 5-dodecylsalicylaldoxime and 2′-hydroxy-5′-nonylacetophenone oxime 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 and 0.019 mg L-1, respectively.

Keywords

• voltammetry
• hydroxyoxime-based extractants
• factorial design