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Data do documento	Título	Autor(es)	Tipo
2004	Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS	Ferreira, Adriana C.; Korn, Maria das Graças Andrade; Ferreira, Sergio Luis Costa	Artigo de Periódico
2004	Doehlert matrix: a chemometric tool for analytical chemistry—review	Ferreira, Sergio Luis Costa; Santos, Walter Nei Lopes dos; Quintella, Cristina Maria Assis Lopes Tavares da Mata Hermida; Barros Neto, Benício de; Bosque-Sendra, Juan Manuel	Artigo de Periódico
2004	Multivariate optimization and validation studies in on-line pre-concentration system for lead determination in drinking water and saline waste from oil refinery	Santos, Walter L. dos; Santos, Carla M. M. dos; Costa, Jorge L. O.; Andrade, Heloysa Martins Carvalho; Ferreira, Sergio Luis Costa	Artigo de Periódico
2004	Doehlert matrix for optimisation of procedure for determination of nickel in saline oil-refinery effluents by use of flame atomic absorption spectrometry after preconcentration by cloud-point extraction	Bezerra, Marcos de Almeida; Conceição, André L. B.; Ferreira, Sergio Luis Costa	Artigo de Periódico
2004	Characterization and determination of the thermodynamic and kinetic properties of the adsorption of the molybdenum(VI)–calmagite complex onto active carbon	Ferreira, Sergio Luis Costa; Andrade, Heloysa Martins Carvalho; Talma, Hilda Costa dos Santos	Artigo de Periódico
Jan-2004	Spectrophotometric determination of chromium in steel with 4-(2- thiazolylazo)-resorcinol (TAR) using microwave radiation	Carvalho, Luciene Santos de; Costa, Antonio Celso Spinola; Ferreira, Sergio Luis Costa; Teixeira, Leonardo Sena Gomes	Artigo de Periódico
2004	Optimization of the preconcentration system of cadmium with 1(2-thiazolylazo)-p-cresol using a knotted reactor and flame atomic absorption spectrometric detection	Cerutti, S.; Ferreira, Sergio Luis Costa; Gásquez, J. A.; Olsina, R. A.; Martinez, L. D.	Artigo de Periódico
2004	Factorial design for multivariate optimization of an on-line preconcentration system for platinum determination by ultrasonic nebulization coupled to inductively coupled plasma optical emission spectrometry	Ferreira, Sergio Luis Costa; Cerutti, S.; Salonia, J. A.; Olsina, R. A.; Martinez, L. D.	Artigo de Periódico
2004	Use of modified rice husks as a natural solid adsorbent of trace metals: characterisation and development of an on-line preconcentration system for cadmium and lead determination by FAAS	Tarley, César Ricardo Teixeira; Ferreira, Sergio Luis Costa; Arruda, Marco Aurélio Zezzi	Artigo de Periódico
2004	Application of factorial design and Doehlert matrix in the optimisation of instrumental parameters for direct determination of silicon in naphtha using graphite furnace atomic absorption spectrometry	Amaro, Joana Angélica de Azerêdo; Ferreira, Sergio Luis Costa	Artigo de Periódico