Application of a Biomimetic Sensor Based on Iron Phthalocyanine Chloride: 4-Methylbenzylidene-Camphor Detection#

نویسندگان

  • Ana Carolina Boni
  • Maria D. P. T. Sotomayor
  • Marcos R. V. Lanza
  • Sônia Maria C. N. Tanaka
  • Auro A. Tanaka
چکیده

A construção e a aplicação de um sensor biomimético para a determinação de 4-metilbenzilideno cânfora (4-MBC), um protetor de radiação ultravioleta (UV), são descritas. O sensor foi preparado pela modificação de um eletrodo de pasta de carbono com um complexo de cloreto de ferro(III) com ftalocianina, FePcCl. As medidas amperométricas conduzidas com o sensor, sob um potencial aplicado de 0,0 V vs. Ag|AgCl em uma mistura de tetraidrofurano e 0,1 mol L H 2 SO 4 (30:70 em volume), mostraram uma resposta linear no intervalo de 1,8×10 to 9,0×10 mol L. Uma investigação detalhada da seletividade da resposta frente a outros nove filtros UV também foi realizada. Um mecanismo de resposta do sensor foi proposto e os resultados para a quantificação de 4-MBC em protetores solares comerciais e em águas de piscinas e de rios são apresentados.

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تاریخ انتشار 2010