Voltammetric analysis of sun-block preparations containing octocrylene and its association with 2-Hydroxy-4-methoxybenzophenone and octyl methoxycinnamate

En este artículo se trata un método voltamperométrico basado en una voltamperometría de onda cuadrada para la determinación de un agente de filtro solar de octileno de forma individual y simultánea a la determinación de 2-Hydroxy-4-methoxybenzophenone (BENZO-3) y octyl methoxycinnamate (OMC).

In this work, an adsorptive cathodic stripping voltammetric method based on square wave voltammetry (SWV) was developed for detn. of the sunscreen agent octocrylene (OCR) individually and simultaneously with 2-Hydroxy-4-methoxybenzophenone (BENZO-3) and octyl methoxycinnamate (OMC).  All voltammetric expts. were conducted in a mixt. 0.04 mol L- 1 BR buffer: EtOH (80:20, v:v) using a hanging mercury drop electrode (HMDE) as working electrode.  The proposed method could be successfully used to analyze com. sun-block prepns. contg. OCR alone and combined with (BENZO-3) and OMC.  For all analyzed samples, the voltammetric method has allowed fast, simple and reliable detn. of these sunscreen agents with minimal sample pre-treatment requirements.

Ferreira, Valdir S.; Junior, Joao B. G.; Oliveira, Celia Maria S. C.; Takeuchi, Regina M.; Santos, Andre L.; Trindade, Magno A. G.

Microchemical Journal (2013), 106, 378-383.