| Revista: | Quimica nova |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000313186 |
| ISSN: | 0100-4042 |
| Autors: | Teixeira, Leonardo S.G1 Brasileiro, Joao F Borges-Junior, Mario M Cordeiro, Paulo W.L Rocha, Sarah A.N2 Costa, Antonio C. Spinola |
| Institucions: | 1Universidade Salvador, Departamento de Engenharia e Arquitetura, Salvador, Bahia. Brasil 2Universidade Federal da Bahia, Instituto de Quimica, Salvador, Bahia. Brasil |
| Any: | 2006 |
| Període: | Jul |
| Volum: | 29 |
| Número: | 4 |
| Paginació: | 741-745 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | In the present work three ferroin reagents were studied for the simultaneous spectrophotometric determination of iron and copper: 1,10-phenanthroline, 2,2'-bipyridine and 2,4,6-tri(2-pyridyl)-1,3,5-triazine. Effect of pH, conditions, order reagent addition, interferences, amount of reagents, lineal range, sensitivity and stability of each system were compared. The 2,4,6-tri(2-pyridyl)-1,3,5-triazine can be used for determination of iron in the presence of copper with a detection limit of 5 µg L-1 and coefficient of variation of 2.0%; However it was not possible to determine directly copper in the presence of iron with this reagent. 1,10-phenanthroline can be used for simultaneous determination of the metallic ions with detection limits of 7 and 8 mg L-1 and coefficients of variation of 1.8 and 2.3% in the determination of iron and copper, respectively. The results showed also that 2,2'-bipyridine can be used for simultaneous determination of the metallic ions with detection limits of 11 and 32 µg L-1 and coefficients of variation of 1.9 and 2.5% in the determination of iron and copper, respectively. The reagents were used for spectrophotometric determination of iron and copper in ethanol fuel |
| Disciplines | Química |
| Paraules clau: | Química analítica, Combustible alcohólico, Ferroína, Espectrofotometría, Cobre, Hierro |
| Keyword: | Chemistry, Analytical chemistry, Alcohol fuel, Ferroin, Spectrophotometry, Copper, Iron |
| Text complet: | Texto completo (Ver HTML) |
