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Results 21-30 of 76 (Search time: 0.06 seconds).

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Issue DateTitleAuthor(s)
2003Application of three-variables Doehlert matrix for optimisation of an on-line pre-concentration system for zinc determination in natural water samples by flame atomic absorption spectrometrySantos, Walter Nei Lopes dos; Santos, Carla M. C.; Ferreira, Sergio Luis Costa
2004Characterization and determination of the thermodynamic and kinetic properties of the adsorption of the molybdenum(VI)–calmagite complex onto active carbonFerreira, Sergio Luis Costa; Andrade, Heloysa Martins Carvalho; Talma, Hilda Costa dos Santos
2007Determination of zinc and copper in human hair by slurry sampling employing sequential multi-element flame atomic absorption spectrometryFerreira, Hadla S.; Santos, Walter Nei Lopes dos; Fiuza, Raigenis da Paz; Nóbrega, Joaquim de Araújo; Ferreira, Sergio Luis Costa
2003Arsenic determination in naphtha by electrothermal atomic absorption spectrometry after preconcentration using multiple injectionsRebouças, Márcio das Virgens; Ferreira, Sergio Luis Costa; Barros Neto, Benicio de
2008Pre-concentration procedure for determination of copper and zinc in food samples by sequential multi-element flame atomic absorption spectrometryFerreira, Hadla S.; Santos, Ana C. N.; Portugal, Lindomar A.; Costa, Antonio Celso Spinola; Miró, Manuel; Ferreira, Sergio Luis Costa
2004Doehlert matrix: a chemometric tool for analytical chemistry—reviewFerreira, 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
2000Uso do violeta de alizarina N (AVN) como reagente espectrofotométrico na determinação de alumínioDantas, Alailson Falcão; Costa, Antonio Celso Spinola; Ferreira, Sergio Luis Costa
2004Multivariate optimization and validation studies in on-line pre-concentration system for lead determination in drinking water and saline waste from oil refinerySantos, Walter L. dos; Santos, Carla M. M. dos; Costa, Jorge L. O.; Andrade, Heloysa Martins Carvalho; Ferreira, Sergio Luis Costa
2008Comparison of direct solid sampling and slurry sampling for the determination of cadmium in wheat flour by electrothermal atomic absorption spectrometryAraujo, Rennan Geovanny Oliveira; Oleszczuk, Nédio; Rampazzo, Roger T.; Costa, Pedro A.; Silva, Márcia M.; Vale, Maria Goreti R.; Welz, Bernhard; Ferreira, Sergio Luis Costa
2008Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)Pereira, S. F. P.; Ferreira, Sergio Luis Costa; Oliveira, G. R.; Palheta, D. C.; Barros, B. C.

 

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