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| Issue Date | Title | Author(s) | | 2012 | Factorial and Doehlert designs in the optimization of a separation procedure using polyurethane foam as a solid phase extractant for platinum determination in ferrous matrices using inductively coupled plasma optical emission spectroscopy | Araújo, Neyla Margarida Lopo de; Ferreira, Sergio Luis Costa; Santos, Hilda Costa dos; Jesus, Djane Santiago de; Bezerra, Marcos de Almeida |
| 28-Feb-2005 | Factorial design in the optimization of preconcentration procedure for lead determination by FAAS | Soylak, Mustafa; Narin, Ibrahim; Bezerra, Marcos de Almeida; Ferreira, Sergio Luis Costa |
| 2009 | Application of multivariate optimization in the development of an ultrasound-assisted extraction procedure for multielemental determination in bean seeds samples using ICP OES | Santos, Wagna Piler Carvalho; Castro, Jacira Teixeira; Bezerra, Marcos de Almeida; Fernandes, Andréa Pires; Ferreira, Sergio Luis Costa; Korn, Maria das Graças Andrade |
| 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 |
| 2003 | Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry | Ferreira, Sergio Luis Costa; Bezerra, Marcos de Almeida; Santos, Walter Nei Lopes dos; Barros Neto, Benício de |
| 2006 | Statistical design-principal component analysis optimization of a multiple response procedure using cloud point extraction and simultaneous determination of metals by ICP OES | Bezerra, Marcos de Almeida; Bruns, Roy Edward; Ferreira, Sergio Luis Costa |
| 2004 | Doehlert matrix for optimisation of procedure for determination of nickel in saline oil-refinery effluents by use of flame atomic absorption spectrometry after preconcentration by cloud-point extraction | Bezerra, Marcos de Almeida; Conceição, André L. B.; Ferreira, Sergio Luis Costa |
| 2006 | Multivariate technique for optimization of digestion procedure by focussed microwave system for determination of Mn, Zn and Fe in food samples using FAAS | Bezerra, Marcos de Almeida; Ferreira, Sergio Luis Costa; Santelli, Ricardo Erthal; SantAna, Otoniel Domingos de; Cassella, Ricardo Jorgensen |
| 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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