| Revista: | Quimica nova |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000198550 |
| ISSN: | 0100-4042 |
| Autors: | Costa, Rui Cerdeira de Campos1 Araujo, Alberto da Nova https://biblat.unam.mx/ca/frecuencias/autor1 |
| Institucions: | 1Universidade do Porto, Faculdade de Farmacia, Porto. Portugal |
| Any: | 2001 |
| Període: | Sep-Oct |
| Volum: | 24 |
| Número: | 5 |
| Paginació: | 588-591 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | This paper describes a sequential injection analysis (SIA) set-up coupled to a flame atomic absorption spectrometer (FAAS) to accomplish the determination of low concentrations of copper in drinking waters. Copper is first retained under neutral media in an on-line 29x1.6 mm column filled with poly(ethylenimine) immobilised on silica gel. The retained analyte is then eluted by flowing through the column 250 mL of a nitric acid solution. The selection of 3.85 ml of sample enabled to obtain a detection limit of 0.27 mg/L and a sampling rate of about 24 samples/h. There was a good agrement between the results of 12 samples furnished by the proposed procedure and by electrothermal atomic absorption spectrometry. Repeatability assessment gave a relative standard deviation of 1.3 % after ten replicate analysis of a sample containing about 70 mg/L in copper |
| Disciplines | Química |
| Paraules clau: | Química analítica, Química inorgánica, Cobre, Agua, Análisis de agua, Absorción atómica, Repetibilidad, Inyección secuencial, Análisis |
| Keyword: | Chemistry, Analytical chemistry, Inorganic chemistry, Copper, Water, Water analysis, Atomic absorption, Repeatability, Sequential injection, Analysis |
| Text complet: | Texto completo (Ver HTML) |
