| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000198164 |
| ISSN: | 0100-4042 |
| Authors: | Aleixo, Luiz Manoel1 Sitton, Melissa Ribeiro, Fabiana Alves de Lima |
| Institutions: | 1Universidade Estadual de Campinas, Instituto de Quimica, Campinas, Sao Paulo. Brasil |
| Year: | 2001 |
| Season: | Nov-Dic |
| Volumen: | 24 |
| Number: | 6 |
| Pages: | 790-794 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | A differential pulse polarographic study with the objective to determine iron (III) in presense of copper (II) in a supporting electrolyte based on citrate - EDTA was made. The best experimental conditions found were a supporting electrolyte of citrate 0.25 mol L-1, EDTA 0.050 mol L-1 and KNO3 0.50 mol L-1, pH 5.00. In this media iron (III) showed a polarographic peak in -0.08 V and the copper (II) in -0.34 V, both vs. Ag/AgCl (saturated KCl). Thus, a analytical method was developed and applied to determine iron (III) in brass alloy, a matrix were copper is in large excess over iron. The results obtained showed no interference of copper in the iron determination. The value of 0.21% of iron in the sample alloy composition was obtained and the method was validated by atomic absortion and recovery test, and the results exhibited a good agreement with the proposed method |
| Disciplines: | Química |
| Keyword: | Química analítica, Química inorgánica, Polarografía, Polarografía de pulso diferencial, Hierro, Cobre, Absorción atómica, Validación, Análisis de latón |
| Keyword: | Chemistry, Analytical chemistry, Inorganic chemistry, Polarography, Differential pulse polarography, Iron, Atomic absorption, Copper, Validation, Brass analysis |
| Full text: | Texto completo (Ver HTML) |
