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Results 41-50 of 76 (Search time: 0.028 seconds).

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Issue DateTitleAuthor(s)
2005Multivariate optimisation of the experimental conditions for determination of three methylxanthines by reversed-phase high-performance liquid chromatographyBispo, Márcia Sousa; Ferreira, Sergio Luis Costa; Andrade, Jailson Bittencourt de; Aragão, Nádia Machado de; Veloso, Márcia Cristina da Cunha
2007Simultaneous pre-concentration procedure for the determination of cadmium and lead in drinking water employing sequential multi-element flame atomic absorption spectrometryPortugal, Lindomar A.; Ferreira, Hadla S.; Santos, Walter Nei Lopes dos; Ferreira, Sergio Luis Costa
2002Application of factorial designs and Doehlert matrix in optimization of experimentalvariabl es associated with the preconcentration and determination of vanadium and copper in seawater by inductively coupled plasma optical emission spectrometryFerreira, Sergio Luis Costa; Queiroz, Adriana Santana; Fernandes, Marcelo Santiago; Hilda Costa dos Santos, Talma
2005The use of water soluble tertiary amine reagent for solubilization and metal determination in fish muscle tissueMelo, Maria H. A.; Costa, Antonio Celso Spinola; Nóbrega, Joaquim de Araújo; Ferreira, Sergio Luis Costa
2006Statistical design-principal component analysis optimization of a multiple response procedure using cloud point extraction and simultaneous determination of metals by ICP OESBezerra, Marcos de Almeida; Bruns, Roy Edward; Ferreira, Sergio Luis Costa
2001Solid phase spectrophotometry for the determination of cobalt in pharmaceutical preparationsTeixeira, Leonardo Sena Gomes; Costa, Antonio Celso Spinola; Assis, Júlio César Rosa; Ferreira, Sergio Luis Costa; Korn, Mauro
2008Direct determination of iron and manganese in wine using the reference element technique and fast sequential multi-element flame atomic absorption spectrometryFerreira, Sergio Luis Costa; Souza, Anderson Santos; Brandão, Geovani Cardoso; Ferreira, Hadla S.; Santos, Walter Nei Lopes dos; Pimentel, M. Fernanda; Vale, Maria Goreti R.
2007Use of cetyltrimethylammonium bromide as surfactant for the determination of copper and chromium in gasoline emulsions by electrothermal atomic absorption spectrometrySantos, Denilson S. S. dos; Teixeira, Alete Paixão; Barbosa, José Tiago Pereira; Ferreira, Sergio Luis Costa; Korn, Maria das Graças Andrade; Teixeira, Leonardo Sena Gomes
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 Costa
2000Determination of cadmium by FAAS after on-line enrichment using a mini column packed with Amberlite XAD-2 loaded with TAMMelo, Maria H. A.; Ferreira, Sergio Luis Costa; Santelli, Ricardo Erthal

 

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