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Issue DateTitleAuthor(s)
15-Feb-2005Optimisation of focused-microwave assisted digestion procedure for Kjeldahl nitrogen determination in bean samples by factorial design and Doehlert designKorn, Maria das Graças Andrade; Santos, Wagna P. C. dos; Korn, Mauro; Ferreira, Sergio Luis Costa
28-Feb-2005Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometryAmorim, Fábio Alan Carqueija; Ferreira, Sergio Luis Costa
28-Feb-2005Factorial design in the optimization of preconcentration procedure for lead determination by FAASSoylak, Mustafa; Narin, Ibrahim; Bezerra, Marcos de Almeida; Ferreira, Sergio Luis Costa
2005Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum productsRebouças, Márcio das Virgens; Ferreira, Sergio Luis Costa; Barros Neto, Benicio de
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
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
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 Costa
2005Application of Box–Behnken design in the optimisation of an on-line pre-concentration system using knotted reactor for cadmium determination by flame atomic absorption spectrometrySouza, Anderson Santos; Santos, Walter Nei Lopes dos; Ferreira, Sergio Luis Costa
2005Field sampling system for determination of cadmium and nickel in fresh water by flame atomic absorption spectrometrySantos, Walter Nei Lopes dos; Santos, Carla M. dos; Ferreira, Sergio Luis Costa
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 Costa


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