Abstract
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).
Highlights
In many studies detected in the literature associated with the preparing of chemically modified silica, particular regard has been put to modifying materials containing transition metal ions that create supported complexes on the silica surface
For Silica gel functionalized (SF)-aminopropyl]trimethoxysilane group (AETS) silica, the amounts of supported groups were set by nitrogen analysis using the method described in the experimental part
The functionalization efficiency was determined for groups as 0.91±0.01 mmol g-1 in SF-AETS based on the nitrogen content
Summary
In many studies detected in the literature associated with the preparing of chemically modified silica, particular regard has been put to modifying materials containing transition metal ions that create supported complexes on the silica surface. Keywords Chemically modified carbon electrode; functionalized silica; metal complexes; dopamine, vitamin B6, cyclic voltammetry
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