| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313278 |
| ISSN: | 0100-4042 |
| Authors: | Vidotti, Eliane Cristina1 Rollemberg, Maria do Carmo E |
| Institutions: | 1Universidade Estadual de Maringa, Departamento de Quimica, Maringa, Parana. Brasil |
| Year: | 2006 |
| Season: | Abr |
| Volumen: | 29 |
| Number: | 2 |
| Pages: | 230-233 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | 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 |
| Disciplines: | Química |
| Keyword: | Química de alimentos, Colorantes alimenticios, Espuma de poliuretano, Espectroscopía derivativa |
| Keyword: | Chemistry, Food chemistry, Food dyes, Polyurethane foam, Derivative spectroscopy |
| Full text: | Texto completo (Ver HTML) |
