Clay modified carbon paste electrode for the voltammetric detection of dopamine in presence of ascorbic acid

Abstract

α-Cobalt (II) hydroxide (α-Co-SO4) was synthesized. Characterized by powder X-ray diffraction, FT-IR spectroscopy, as well as elemental analysis indicates the formation of α-cobalt (II) hydroxide. The synthesized α-Co (II) hydroxide was used to fabricate modified carbon paste electrode for the determination of dopamine. The α-Co-SO4/SDS/CPE was characterized by electrochemical methods and modified electrode was used to determinate dopamine (DA) and ascorbic acid (AA) simultaneously. The detection limit and quantification limits for DA were found to be 2.5×10−7mol/L and 5.3×10−7mol/L respectively.