Application of a biomimetic sensor based on iron phthalocyanine chloride: 4-methylbenzylidene-camphor detection

• Autor(a) principal: Boni,Ana Carolina
• Data de Publicação: 2010
• Outros Autores: Sotomayor,Maria D. P. T., Lanza,Marcos R. V., Tanaka,Sônia Maria C. N., Tanaka,Auro A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of the Brazilian Chemical Society (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010000700025
• topic: iron phthalocyanine; amperometric sensor; methylbenzylidene camphor

The construction and application of a biomimetic sensor for determination of 4-methylbenzylidene camphor (4-MBC), an ultraviolet (UV) radiation protector, are described. The sensor was prepared by modifying a carbon paste electrode with iron(III) phthalocyanine chloride (FePcCl). Amperometric measurements carried out with the sensor under an applied potential of 0.0 V vs. Ag|AgCl in a mixture of tetrahydrofuran and 0.1 mol L-1 H2SO4 solution (30:70 volume ratio) showed a linear response range from 1.8×10-4 to 9.0×10-4 mol L-1. A detailed selectivity investigation for other nine UV filters was also performed. A sensor response mechanism was proposed and the results for 4-MBC quantification in commercial sunscreens and in water from swimming pools and rivers are presented.