Author(s)

Michelli Thomaz Laranjeira, Fabio de Lima, Silvio Cesar de Oliveira, Valdir Souza Ferreira, Robson Tadeu Soares de Oliveira

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A new electroanalytical procedure was developed for the determination of Benzophenone-3 (BENZO) in commercial sunscreen as the active ingredient. The procedure is based on the use of electrochemical methods as cyclic and square-wave voltammetry, with boron-doped diamond (BDD) electrodes. The reduction of BENZO in Britton-Robinson buffer (0.1 mol●L^–1) using this type of electrode gives rise to one irreversible peak in –1.30 V (versus Ag/AgCl) in presence of cationic surfactant cetyltrimethylammonium bromide (CTABr). The proposed electrochemical method was successfully applied to the analysis of commercially available pharmaceutical preparations.

Boron-Doped Diamond, Benzophenone-3 BENZO and Square-Wave Voltammetry

M. Laranjeira, F. de Lima, S. de Oliveira, V. Ferreira and R. de Oliveira, "Analytical Determination of Benzophenone-3 in Sunscreen Preparations Using Boron-Doped Diamond Electrodes," American Journal of Analytical Chemistry, Vol. 2 No. 3, 2011, pp. 383-391. doi: 10.4236/ajac.2011.23047.