Espectrofotometria derivativa: uma estratégia simples para a determinação simultânea de corantes em alimentos

Química Nova

Eliane Cristina Vidotti¹  Maria Do Carmo E. Rollemberg¹ 

[1] ,Universidade Estadual de Maringá Departamento de Química

关键词: first derivative spectrophotometry;    polyurethane foam;    food dyes;   

DOI  :  10.1590/S0100-40422006000200010

来源: SciELO

【 摘 要 】

A very simple spectrophotometric method is described for resolving binary mixture of the food colorants Sunset Yellow (INS 110) and Tartrazine Yellow (INS 102) by using the first derivative spectra with measurements at zero-crossing wavelengths. Before the spectrophotometric measurements, the dyes were sorbed onto polyurethane foam and recovered in N,N-dimethilformamide. Commercial food products (gelatine and juice powder) were analysed by using the proposed method and the HPLC technique. The results are in very good agreement and the differences between the methods is not statistically important. Therefore, the first-order derivative spectrophotometric method is accurate, precise, reliable and could be applied to the routine analysis of food samples.

【 授权许可】

CC BY-NC   
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