Roberto Salgado Amado
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Roberto Salgado Amado has a total of 26 co-authors. Here are the top co-authors by number of shared publications:
- Eliane D'ELia
Department of Inorganic Chemistry, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, Cidade Universitária, Rio de Janeiro 21941-909, Brazil
4 shared publications Eduardo de Castro Vieira
2 shared publicationsAdriana Barbosa da Silva
Departamento de Química Inorgânica, Instituto de Química, UFRJ, Avenida Athos da Silveira Ramos 149, Centro de Tecnologia, Bloco A – laboratório 634A, CEP 21941-909 Cidade Universitária, Rio de Janeiro-RJ, Brazil
1 shared publication- Alexandre Guedes Torres
Lipid Biochemistry and Lipidomics Laboratory, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-598, Brazil
1 shared publication Camila Faia de Sá
Departamento de Química Inorgânica, Instituto de Química, UFRJ, Avenida Athos da Silveira Ramos 149, Centro de Tecnologia, Bloco A – Laboratório 634A, CEP 21941-909, Cidade Universitária, Rio de Janeiro, RJ, Brazil
1 shared publicationCarlos Alberto da Silva Riehl
Departamento de Química Analítica, Instituto de Química, UFRJ, Avenida Athos da Silveira Ramos 149, Centro de Tecnologia, Bloco A – Sala 507, CEP 21941-909, Cidade Universitária, Rio de Janeiro, RJ, Brazil
1 shared publication
Latest Publications
- Open Access
- 1 January 2012
- Published by FapUNIFESP (SciELO) in Química Nova
- Vol. 35 (3) , 601-607
Determinação de glicerol livre e total em amostras de biodiesel por método enzimático com detecção colorimétrica
A method based on enzymatic activities was developed using three enzymes (glycerokinase, glycerol-3-phosphate oxidase and peroxidase) and colorimetric detection for the determination of glycerol in biodiesel. The enzymatic conversion of glycerol produces H2O2 that is eliminated by the action of peroxidase, an oxygen acceptor and 4- aminoantipirine, producing water and a colored compound, which was analyzed. This method showed good linear correlation coefficient (r = 0.9937) in the concentration range of 4.95 x 10-5 to 3.96 x 10-4% (w/w) and had experimental limits of detection and quantitation of 7.10 x 10-6 and 2.10 x 10-5% (w/w), respectively.
- 1 January 2012
- Published by FapUNIFESP (SciELO) in Química Nova
- Vol. 35 (3) , 601-607
Open AccessDeterminação de glicerol livre e total em amostras de biodiesel por método enzimático com detecção colorimétrica
A method based on enzymatic activities was developed using three enzymes (glycerokinase, glycerol-3-phosphate oxidase and peroxidase) and colorimetric detection for the determination of glycerol in biodiesel. The enzymatic conversion of glycerol produces H2O2 that is eliminated by the action of peroxidase, an oxygen acceptor and 4- aminoantipirine, producing water and a colored compound, which was analyzed. This method showed good linear correlation coefficient (r = 0.9937) in the concentration range of 4.95 x 10-5 to 3.96 x 10-4% (w/w) and had experimental limits of detection and quantitation of 7.10 x 10-6 and 2.10 x 10-5% (w/w), respectively.
- Top Cited Papers
- 1 July 2011
- Published by Elsevier in Corrosion Science
- Vol. 53 (7) , 2385-2392
Inhibitory action of aqueous coffee ground extracts on the corrosion of carbon steel in HCl solution
- 1 July 2011
- Published by Elsevier in Corrosion Science
- Vol. 53 (7) , 2385-2392
Top Cited PapersInhibitory action of aqueous coffee ground extracts on the corrosion of carbon steel in HCl solution
- 13 July 2010
- Published by Springer Nature in Journal of Applied Electrochemistry
- Vol. 40 (11) , 2061-2063
Analysis of free glycerol in biodiesel using an electrochemical assay based on a two-enzyme platinum microelectrode system
- 13 July 2010
- Published by Springer Nature in Journal of Applied Electrochemistry
- Vol. 40 (11) , 2061-2063
Analysis of free glycerol in biodiesel using an electrochemical assay based on a two-enzyme platinum microelectrode system
- 20 April 2010
- Published by Wiley in Electroanalysis
- Vol. 22 (9) , 995-999
Analysis of Free and Total Glycerol in Biodiesel Using an Electrochemical Assay Based on a Two‐Enzyme Oxygen‐Electrode System
In this work, an electroenzymatic methodology based on two coupled enzymatic activities (glycerokinase and glycerol‐3‐phosphate oxidase) was developed using an oxygen Clark‐type electrode for the determination of free and total glycerol in biodiesel samples. The enzymatic conversion of glycerol consumes oxygen, which is measured amperometrically in a Clark‐type electrode and correlated with the concentration of glycerol in the sample. The electroenzymatic method proposed showed a good linear correlation coefficient (R=0.9990) with a linear response in the concentration range of 6.25×10−5 to 6.25×10−4% (w/v) and limits of detection and quantification at 1.0×10−5% and 3.0×10−5% (w/v), respectively. Good correlations were found between the results obtained in this work and those by the gas chromatography technique (R=0.9994). The proposed method was shown to be promising for the analysis of glycerol in biodiesel samples, with a simple and inexpensive methodology compared with the gas chromatography technique.
- 20 April 2010
- Published by Wiley in Electroanalysis
- Vol. 22 (9) , 995-999
Analysis of Free and Total Glycerol in Biodiesel Using an Electrochemical Assay Based on a Two‐Enzyme Oxygen‐Electrode System
In this work, an electroenzymatic methodology based on two coupled enzymatic activities (glycerokinase and glycerol‐3‐phosphate oxidase) was developed using an oxygen Clark‐type electrode for the determination of free and total glycerol in biodiesel samples. The enzymatic conversion of glycerol consumes oxygen, which is measured amperometrically in a Clark‐type electrode and correlated with the concentration of glycerol in the sample. The electroenzymatic method proposed showed a good linear correlation coefficient (R=0.9990) with a linear response in the concentration range of 6.25×10−5 to 6.25×10−4% (w/v) and limits of detection and quantification at 1.0×10−5% and 3.0×10−5% (w/v), respectively. Good correlations were found between the results obtained in this work and those by the gas chromatography technique (R=0.9994). The proposed method was shown to be promising for the analysis of glycerol in biodiesel samples, with a simple and inexpensive methodology compared with the gas chromatography technique.
- Open Access
- 1 February 2007
- Published by FapUNIFESP (SciELO) in Química Nova
- Vol. 30 (1) , 189-197
Pilhas a combustível de óxido sólido: materiais, componentes e configurações
In this paper the current status of fuel cells is described with particular emphasis on high (T > 800 ºC) and intermediate (T < 800 ºC) temperature solid oxide fuel cells. Also the importance of the fuel cell technology is shown. Reviewed are the fundamental features, the basic principles, types of fuel cell, fabrication methods, cell configurations and the development of components (cathodes, anodes, electrolytes, interconnect) and materials
- 1 February 2007
- Published by FapUNIFESP (SciELO) in Química Nova
- Vol. 30 (1) , 189-197
Open AccessPilhas a combustível de óxido sólido: materiais, componentes e configurações
In this paper the current status of fuel cells is described with particular emphasis on high (T > 800 ºC) and intermediate (T < 800 ºC) temperature solid oxide fuel cells. Also the importance of the fuel cell technology is shown. Reviewed are the fundamental features, the basic principles, types of fuel cell, fabrication methods, cell configurations and the development of components (cathodes, anodes, electrolytes, interconnect) and materials