dc.creator | Santos, Walter Nei Lopes dos | |
dc.creator | Dias, Fábio de Souza | |
dc.creator | Fernandes, M. S. | |
dc.creator | Rebouças, Márcio das Virgens | |
dc.creator | Vale, Maria Goreti Rodrigues | |
dc.creator | Welz, Bernhard | |
dc.creator | Ferreira, Sergio Luis Costa | |
dc.date.accessioned | 2013-11-29T12:26:13Z | |
dc.date.accessioned | 2022-10-07T18:49:15Z | |
dc.date.available | 2013-11-29T12:26:13Z | |
dc.date.available | 2022-10-07T18:49:15Z | |
dc.date.created | 2013-11-29T12:26:13Z | |
dc.date.issued | 2005 | |
dc.identifier | 0267-9477 | |
dc.identifier | http://repositorio.ufba.br/ri/handle/ri/14001 | |
dc.identifier | v. 20, n. 2 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/4012396 | |
dc.description.abstract | A method has been developed for the direct determination of copper in petroleum condensate using detergentless micro-emulsions (three-component solutions) and graphite furnace atomic absorption spectrometry. The optimization was performed using a three-level full factorial design, resulting in pyrolysis and atomization temperatures of 920 °C and 2600 °C, respectively. Using the secondary copper line at 327.4 nm, which is less affected by the magnetic field of the Zeeman-effect background correction system, a characteristic mass of 39 pg, and detection limit of 0.4 μg l−1 was obtained using 20 μl of micro-emulsion, which corresponds to 1.2 μg l−1 in petroleum condensate. The precision, expressed as relative standard deviation, was 2.0% or 2.8% for copper concentrations of 30 μg l−1 and 5.0 μg l−1, respectively. The spike recovery of 105% for copper added to a petroleum condensate sample proved that this procedure could be applied satisfactorily to a determination in this matrix. | |
dc.language | en | |
dc.publisher | Brasil | |
dc.rights | Acesso Aberto | |
dc.source | http://dx.doi.org/ 10.1039/B414502J | |
dc.title | Application of multivariate technique in method development for the direct determination of copper in petroleum condensate using graphite furnace atomic absorption spectrometry | |
dc.type | Artigo de Periódico | |