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Artigo Produção Nacional Revisado por pares
BIBTEX RIS

Simultaneous electrochemical determination of three sunscreens using cetyltrimethylammonium bromide

2007; Elsevier BV; Volume: 63; Issue: 1 Linguagem: Inglês

10.1016/j.colsurfb.2007.11.001

ISSN

1873-4367

Autores

J. Cardoso, Bruna Milca Lenzi Armondes, João Bosco Galindo Júnior e Valdir Ferreira,

Tópico(s)

Dye analysis and toxicity

Resumo

This paper proposes a methodology based on electrochemical reduction for the simultaneous determination of three sunscreen agents, namely 4-methylbenzylidene camphor (MBC), benzophenone-3 (BENZO) and 2-ethylhexyl-4-methoxycinnamate (EHMC) by differential-pulse polarography (DPP). The highest peak currents and optimal separation of reduction peaks were obtained by using a supporting electrolyte consisted of Britton–Robinson buffer–methanol (8:2) solution at pH 4.0 and cationic surfactant 3.0 × 10−4 mol L−1 cetyltrimethylammonium bromide (CTAB). The methodology was validated using four commercial sunscreen preparation as a sample and the results showed high recovery rates. The efficiency of the proposed methodology was demonstrated by comparing the results obtained by DPP with those obtained by the high-performance liquid chromatography (HPLC) method.

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