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81

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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82

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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83

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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84

Simultaneous spectrophotometric determination of nickel and iron in copper-base alloy with bromo—PADAP

by Costa, Antonio Celso Spinola

Published 1993

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

Adsorptive preconcentration for voltammetric measurements of trace levels of vanadium in the presence of copper

by Farias, Pércio Augusto Mardini

Published 1993

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

Adsorptive stripping voltammetric behaviour of copper complexes of some heterocyclic azo compounds

by Farias, Pércio Augusto Mardini

Published 1992

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

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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88

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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89

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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90

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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91

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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92

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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93

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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94

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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95

Development of an analytical approach for determination of total arsenic and arsenic (III) in airborne particulate matter by slurry sampling and HG-FAAS

by Macedo, Samuel Marques

Published 2010

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

Method development for the determination of lead in wine using electrothermal atomic absorption spectrometry comparing platform and filter furnace atomizers and different chemical...

by Dessuy, Morgana B.

Published 2008

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

Speciation of chromium in river water samples contaminated with leather effluents by flame atomic absorption spectrometry after separation/preconcentration by cloud point extractio...

by Matos, Geraldo D.

Published 2009

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

Use of slurry sampling for the direct determination of zinc in yogurt by high resolution-continuum source flame atomic absorption spectrometry

by Brandão, Geovani Cardoso

Published 2010

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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