| Revista: | Quimica nova |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000313261 |
| ISSN: | 0100-4042 |
| Autors: | Silveira, Eva Lucia Cardoso1 Caland, Lília Basilio de Moura, Carla Veronica Rodarte de Moura, Edmilson Miranda |
| Institucions: | 1Universidade Federal do Piaui, Departamento de Quimica, Teresina, Piaui. Brasil |
| Any: | 2006 |
| Període: | Nov |
| Volum: | 29 |
| Número: | 6 |
| Paginació: | 1193-1197 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | A simple and reliable ashing procedure is proposed for the preparation of used lubricating oil samples for the determination of Zn, Fe, Pb, Ni and Cu by the flame atomic absorption spectrometry technique. Sulphanilic acid was added to oil samples, the mixture coked and the coke ashed at 550 ºC. The solutions of the ash were analysed by flame AAS for these metals. The quantification limits were 38.250 µg g-1 for Zn, 4.550 µg g-1 for Fe, 1.562 µg g-1 for Pb, 1.450 µg g-1 for Ni, and 0.439 µg g-1 for Cu. The determinations, in lubricating oil, showed good precision and accuracy with recoveries between 90 and 110 %, indicating a negligible matrix effect in the experiments using addition of analyte, with relative standard deviation lower than 5%. The results for analysis of wastewater contamined by theses lubricants showed a very high relative standard deviation |
| Disciplines | Química |
| Paraules clau: | Química analítica, Química industrial, Aceite lubricante, Determinación de metales, Espectrometría de absorción atómica |
| Keyword: | Chemistry, Analytical chemistry, Industrial chemistry, Lubricating oil, Metal determination, Atomic absorption spectrometry |
| Text complet: | Texto completo (Ver HTML) |
