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Results 61-70 of 110 (Search time: 0.033 seconds).

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Issue DateTitleAuthor(s)
2000A separation method to overcome the interference of aluminium on zinc determination by inductively coupled plasma atomic emission spectroscopyJesus, Djane S. de; Korn, Maria das Graças Andrade; Ferreira, Sergio Luis Costa; Carvalho, Marcelo Souza de
2004Application of factorial design and Doehlert matrix in the optimisation of instrumental parameters for direct determination of silicon in naphtha using graphite furnace atomic absorption spectrometryAmaro, Joana Angélica de Azerêdo; Ferreira, Sergio Luis Costa
2001Molybdenum determination in iron matrices by ICP-AES after separation and preconcentration using polyurethane foamFerreira, Sergio Luis Costa; Santos, Hilda Costa dos; Jesus, Djane Santiago de
2003Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometryFerreira, Sergio Luis Costa; Bezerra, Marcos de Almeida; Santos, Walter Nei Lopes dos; Barros Neto, Benício de
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 Costa
2002Application of Doehlert matrix and factorial designs in optimization of experimental variables associated with preconcentration and determination of molybdenum in sea-water by inductively coupled plasma optical emission spectrometryFerreira, Sergio Luis Costa; Santos, Hilda Costa dos; Carvalho, Marcelo Souza de; Fernandes, Marcelo Santiago
2004Use 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 FAASTarley, César Ricardo Teixeira; Ferreira, Sergio Luis Costa; Arruda, Marco Aurélio Zezzi
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

 

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