Application of experimental design on determination of aluminum content in saline samples by adsorptive cathodic stripping voltammetry

Authors: SİNAN YILMAZ, BETÜL ÖZTÜRK, DURMUŞ ÖZDEMİR, AHMET EMİN EROĞLU, FATMA NİL ERTAŞ

Abstract: Adsorptive cathodic stripping voltammetric determination of aluminum at ng mL^{-1} levels in salt samples based on the metal complexation with Calcon (1-(2-hydroxynaphthylazo)-2 naphthol-4-sulfonic acid) and the subsequent adsorptive deposition onto a hanging mercury drop electrode was studied. Central composite design was used as a design method. Several chemical and instrumental parameters (pH, ligand concentration, deposition time, deposition potential, and complexing time) were involved in the experimental design. Analytical parameters such as repeatability, linearity, and accuracy were also investigated and the detection limit was found as 0.32 ng mL^{-1}.

Keywords: Aluminum, Calcon, adsorptive cathodic stripping voltammetry, central composite design

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