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Química Nova

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CALIXTO, Carolina Maria Fioramonti; SANTOS, Sidney Xavier dos  and  CAVALHEIRO, Éder Tadeu Gomes. Graphite-araldite® composite electrode: didactic applications - part II. Quím. Nova [online]. 2014, vol.37, n.2, pp.367-372. ISSN 0100-4042.

This work proposes the use of a graphite-Araldite® 70% (graphite, m/m) composite electrode in didactic experiments, specifically in the quantitative determination of the neurotransmitter dopamine (DA) in a sample of pharmaceutical formulation. The goal is to demonstrate the possibility of using voltammetric techniques in quality control of medicines, besides covering some concepts such as the influence of pH on the redox process, the differential pulse voltammetry (DPV) technique, the optimization of experiments and comparison with an official method described in the United States Pharmacopoeia.

Keywords : composite electrode; graphite-epoxy composites; dopamine.

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