This work describes the development and application of chemically modified carbon paste electrode (CMCPE) with metal ion complexes of transition metals Co(II) and Cu(II) anchored on functionalized silica (SF). The prepared CMCPE was used for the determination of dopamine (DA) in the presence of pyridoxine (VB6) in commercially available pharmaceutical formulation, without any treatment of samples. The CMCPEs were built by incorporating graphite and functionalized silica and complexes of metal ions (Cu and Co) anchored by nitrogen groups on the silica surface. The electrochemical analysis was performed by cyclic voltammetry, while a drug analyzed in the present study was Revivan ampoules (DA determination).
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