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Data do documentoTítuloAutor(es)Tipo
2005Application of multivariate technique in method development for the direct determination of copper in petroleum condensate using graphite furnace atomic absorption spectrometrySantos, Walter Nei Lopes dos; Dias, Fábio de Souza; Fernandes, M. S.; Rebouças, Márcio das Virgens; Vale, Maria Goreti Rodrigues; Welz, Bernhard; Ferreira, Sergio Luis CostaArtigo de Periódico
2003On-line preconcentration system using a minicolumn of polyurethane foam loaded with Me-BTABr for zinc determination by Flame Atomic Absorption SpectrometrySantos, Walter Nei Lopes dos; Lemos, Valfredo Azevedo; Santos, Juracir SilvaArtigo de Periódico
2009A photo-oxidation procedure using UV radiation/H2O2 for decomposition of wine samples: determination of iron and manganese content by flame atomic absorption spectrometrySantos, Walter Nei Lopes dos; Brandão, Geovani Cardoso; Portugal, Lindomar Andrade; David, Jorge Mauricio; Ferreira, Sergio Luis CostaArtigo de Periódico
2007Application of multivariate techniques for optimization of direct method for determination of lead in naphtha and petroleum condensate by electrothermal atomic absorption spectrometryDias, Fábio de Souza; Santos, Walter Nei Lopes dos; Costa, Antonio Celso Spinola; Welz, Bernhard; Vale, Maria Goreti R.; Ferreira, Sergio Luis CostaArtigo de Periódico
2005Determination of copper in powdered chocolate samples by slurry-sampling flame atomic-absorption spectrometrySantos, Walter Nei Lopes dos; Silva, Erik Galvão Paranhos da; Fernandes, Marcelo Santiago; Araujo, Rennan Geovanny Oliveira; Costa, Antonio Celso SpinolaArtigo de Periódico
2005Method development for the determination of manganese in wheat flour by slurry sampling flame atomic absorption spectrometryAraujo, Rennan Geovanny Oliveira; Dias, Fábio de Souza; Macedo, Samuel Marques; Santos, Walter Nei Lopes dos; Ferreira, Sergio Luis CostaArtigo de Periódico
2008Fast method for the determination of copper, manganese and iron in seafood samplesSilva, Erik Galvão Paranhos da; Hatje, Vanessa; Santos, Walter Nei Lopes dos; Costa, Letícia M.; Nogueira, Ana Rita de Araujo; Ferreira, Sergio Luis CostaArtigo de Periódico
2009Multivariate optimization and validation of an analytical method for the determination of cadmium in wines employing ET AASFerreira, Sergio Luis Costa; Jesus, Robson M. de; Matos, Geraldo D.; Andrade, Jailson Bittencourt de; Bruns, Roy Edward; Santos, Walter Nei Lopes dos; Cavalcante, Dannuza Dias; Vale, Maria G. R.; Dessuy, Morgana B.Artigo de Periódico
2001On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometryFerreira, Sergio Luis Costa; Santos, Walter Nei Lopes dos; Lemos, Valfredo AzevedoArtigo de Periódico
2003Use of factorial design and Doehlert matrix for multivariate optimisation of an on-line preconcentration system for lead determination by flame atomic absorption spectrometryFerreira, Sergio Luis Costa; Santos, Walter Nei Lopes dos; Bezerra, Marcos de Almeida; Lemos, Valfredo Azevedo; Bosque-Sendra, Juan ManuelArtigo de Periódico