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81

Method development for the determination of manganese in wheat flour by slurry sampling flame atomic absorption spectrometry

by Araujo, Rennan Geovanny Oliveira

Published 2005

Other Authors: “...Ferreira, Sergio Luis Costa...”
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82

Spectrophotometric Determination of Uranium Using 2-(2-Thiazolylazo)-p-Cresol (TAC) in the Presence of Surfactants

by Teixeira, Leonardo Sena Gomes

Published 1999

Other Authors: “...Ferreira, Sergio Luis Costa...”
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83

Use of factorial design for optimization of microwave-assisted digestion of lubricating oil

by Costa, Letícia M.

Published 2005

Other Authors: “...Ferreira, Sergio Luis Costa...”
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84

The use of water soluble tertiary amine reagent for solubilization and metal determination in fish muscle tissue

by Melo, Maria H. A.

Published 2005

Other Authors: “...Ferreira, Sergio Luis Costa...”
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85

Spectrophotometric determination of chromium in steel with 4-(2- thiazolylazo)-resorcinol (TAR) using microwave radiation

by Carvalho, Luciene Santos de

Published 2004

Other Authors: “...Ferreira, Sergio Luis Costa...”
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86

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 usin...

by Araújo, Neyla Margarida Lopo de

Published 2012

Other Authors: “...Ferreira, Sergio Luis Costa...”
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87

Selenite biotransformation during brewing. Evaluation by HPLC–ICP-MS

by Martínez, Maria Sánchez

Published 2012

Other Authors: “...Ferreira, Sergio Luis Costa...”
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88

Determination of mercury in rice by MSFIA and cold vapour atomic fluorescence spectrometry

by Silva, Douglas Gonçalves da

Published 2013

Other Authors: “...Ferreira, Sergio Luis Costa...”
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89

Selectivity enhancement in spectrophotometry: on-line interference suppression using polyurethane foam minicolumn for aluminum determination with Methyl Thymol Blue

by Cassella, Ricardo Jorgensen

Published 1999

Other Authors: “...Ferreira, Sergio Luis Costa...”
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90

Quantitative separation of zinc traces from cadmium matrices by solid-phase extraction with polyurethane foam

by Jesus, Djane Santiago de

Published 1998

Other Authors: “...Ferreira, Sergio Luis Costa...”
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91

Multivariate technique for optimization of digestion procedure by focussed microwave system for determination of Mn, Zn and Fe in food samples using FAAS

by Bezerra, Marcos de Almeida

Published 2006

Other Authors: “...Ferreira, Sergio Luis Costa...”
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92

A photo-oxidation procedure using UV radiation/H2O2 for decomposition of wine samples: determination of iron and manganese content by flame atomic absorption spectrometry

by Santos, Walter Nei Lopes dos

Published 2009

Other Authors: “...Ferreira, Sergio Luis Costa...”
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93

Pressure-driven mesofluidic platform integrating automated on-chip renewable micro-solid-phase extraction for ultrasensitive determination of waterborne inorganic mercury

by Portugal, Lindomar Andrade

Published 2013

Other Authors: “...Ferreira, Sergio Luis Costa...”
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94

Multivariate optimisation of the experimental conditions for determination of three methylxanthines by reversed-phase high-performance liquid chromatography

by Bispo, Márcia Sousa

Published 2005

Other Authors: “...Ferreira, Sergio Luis Costa...”
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95

Optimization of the preconcentration system of cadmium with 1(2-thiazolylazo)-p-cresol using a knotted reactor and flame atomic absorption spectrometric detection

by Cerutti, S.

Published 2004

Other Authors: “...Ferreira, Sergio Luis Costa...”
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96

Multivariate optimization and validation studies in on-line pre-concentration system for lead determination in drinking water and saline waste from oil refinery

by Santos, Walter L. dos

Published 2004

Other Authors: “...Ferreira, Sergio Luis Costa...”
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97

Sequential determination of iron and titanium by flow-injection analysis

by Barberino, Maria Goreth Matos de Andrade

Published 1992

Other Authors: “...Ferreira, Sergio Luis Costa...”
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98

Flow injection determination of cobalt after its sorption onto polyurethane foam loaded with 2-(2-thiazolylazo)-p-cresol (TAC)

by Cassella, Ricardo Jorgensen

Published 2001

Other Authors: “...Ferreira, Sergio Luis Costa...”
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99

Solid phase spectrophotometry for the determination of cobalt in pharmaceutical preparations

by Teixeira, Leonardo Sena Gomes

Published 2001

Other Authors: “...Ferreira, Sergio Luis Costa...”
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100

A separation method to overcome the interference of aluminium on zinc determination by inductively coupled plasma atomic emission spectroscopy

by Jesus, Djane S. de

Published 2000

Other Authors: “...Ferreira, Sergio Luis Costa...”
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