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| Issue Date | Title | Author(s) | | 2011 | On-line simultaneous pre-concentration procedure for the determination of cadmium and lead in drinking water employing sequential multi-element flame atomic absorption spectrometry | Santos, João Victor da Silva; Silva, O. B.; Araújo, André S.; Lemos, Valfredo Azevedo; Miró, Manuel; Ferreira, Sergio Luis Costa; Santos, Walter Nei Lopes dos |
| 2006 | A pre-concentration procedure using coprecipitation for determination of lead and iron in several samples using flame atomic absorption spectrometry | Ferreira, Sergio Luis Costa; Saracoglu, S.; Soylak, Mustafa; Peker, D. S. Kacar; Elci, L.; Santos, Walter Nei Lopes dos; Lemos, Valfredo Azevedo |
| 2007 | On-line system for preconcentration and determination of metals in vegetables by Inductively Coupled Plasma Optical Emission Spectrometry | Bezerra, Marcos de Almeida; Santos, Walter Nei Lopes dos; Lemos, Valfredo Azevedo; Korn, Maria das Graças Andrade; Ferreira, Sergio Luis Costa |
| 2007 | Review of procedures involving separation and preconcentration for the determination of cadmium using spectrometric techniques | Korn, Maria das Graças Andrade; Ferreira, Sergio Luis Costa; Andrade, Jailson Bittencourt de; Lemos, Valfredo Azevedo; Santos, Walter Nei Lopes dos; Souza, Anderson Santos; Ferreira, Hadla Sousa; Rodrigues, Frederico de Medeiros; Pereira, Madson de Godoi; Silva, Erik Galvão Paranhos da |
| 2007 | Automatic on-line pre-concentration system using a knotted reactor for the FAAS determination of lead in drinking water | Souza, Anderson Santos; Brandão, Geovani Cardoso; Santos, Walter Nei Lopes dos; Lemos, Valfredo Azevedo; Ganzarolli, Edgard Moreira; Bruns, Roy Edward; Ferreira, Sergio Luis Costa |
| 2001 | On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry | Ferreira, Sergio Luis Costa; Santos, Walter Nei Lopes dos; Lemos, Valfredo Azevedo |
| 2006 | Separation and preconcentration procedures for the determination of lead using spectrometric techniques: A review | Korn, Maria das Graças Andrade; Ferreira, Sergio Luis Costa; Andrade, Jailson Bittencourt de; Jesus, Djane S. de; Lemos, Valfredo Azevedo; Bandeira, Marcus Luciano Souza de Ferreira; Santos, Walter Nei Lopes dos; Bezerra, Marcos de Almeida; Amorim, Fábio Alan Carqueija; Souza, Anderson Santos |
| 2003 | Use of factorial design and Doehlert matrix for multivariate optimisation of an on-line preconcentration system for lead determination by flame atomic absorption spectrometry | Ferreira, Sergio Luis Costa; Santos, Walter Nei Lopes dos; Bezerra, Marcos de Almeida; Lemos, Valfredo Azevedo; Bosque-Sendra, Juan Manuel |
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