Revista: | Quimica nova |
Base de datos: | PERIÓDICA |
Número de sistema: | 000313159 |
ISSN: | 0100-4042 |
Autors: | Oliveira, Ines Rosane Welter Zwirtes de1 Vieira, Iolanda Cruz |
Institucions: | 1Universidade Federal de Santa Catarina, Departamento de Quimica, Florianopolis, Santa Catarina. Brasil |
Any: | 2006 |
Període: | Sep |
Volum: | 29 |
Número: | 5 |
Paginació: | 932-939 |
País: | Brasil |
Idioma: | Portugués |
Tipo de documento: | Artículo |
Enfoque: | Experimental, aplicado |
Resumen en inglés | Biosensors were developed by immobilization of gilo (Solanum gilo) enzymatic extract on chitosan biopolymers using three different procedures: glutaraldehyde, carbodiimide/glutaraldehyde and epichlorohydrin/glutaraldehyde. The best biosensor performance was obtained after the immobilization of peroxidase on chitosan with epichlorohydrin/glutaraldehyde. Linear analytical curves for hydroquinone concentrations from 2.5x10-4 to 4.5x10-3 mol L-1 with a detection limit of 2.0x10-6 mol L-1 and recovery of hydroquinone ranging from 95.1 to 105% were obtained. The relative standard deviation was < 1.0 % for a solution of 3.0x10-4 mol L-1 hydroquinone and 2.0x10-3 mol L-1 hydrogen peroxide in 0.1 mol L-1 phosphate buffer solution at pH 7.0 (n=8). The lifetime of this biosensor was 6 months (at least 300 determinations) |
Disciplines | Química |
Paraules clau: | Bioquímica, Biotecnología, Inmovilización enzimática, Biosensores, Peroxidasa, Quitosano |
Keyword: | Chemistry, Biochemistry, Biotechnology, Enzyme immobilization, Peroxidase, Biosensors, Chitosan |
Text complet: | Texto completo (Ver HTML) |