Uncertainty in the Determination of Glucose and Sucrose in Solutions with Chitosan by Enzymatic Methods

نویسندگان

  • Berta N. Estevinho
  • Amélia Ferraz
  • Lúcia Santos
  • Fernando Rocha
  • Arminda Alves
چکیده

O objetivo deste trabalho foi determinar a aplicabilidade de dois métodos enzimáticos um para a quantificação da glucose e outro da sacarose em soluções aquosas contendo quitosano. Os métodos analíticos foram validados e os principais parâmetros determinados como limite de detecção, intervalo de linearidade, precisão e exatidão. A incerteza global do método enzimático da glucose foi inferior a 10% no intervalo de 700 a 2000 mg L, para o método de análise da sacarose a incerteza global foi inferior a 3% para todo o intervalo de análise (100-1000 mg L). Apesar da semelhança das performances com relação a outros métodos analíticos, o método enzimático provou ser mais adequado, em particular do que a cromatografia líquida de alta eficiência (HPLC), principalmente se um grande número de amostras deve ser analisado (permitindo um resultado rápido) e ainda devido às propriedades mucoadesivas do quitosano que dificultam as metodologias analíticas por HPLC, criando problemas de estabilidade na coluna cromatográfica.

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تاریخ انتشار 2013