R
Richard Macedo de Oliveira
Researcher at Universidade Federal de Pelotas
Publications - 5
Citations - 107
Richard Macedo de Oliveira is an academic researcher from Universidade Federal de Pelotas. The author has contributed to research in topics: Certified reference materials & Sample preparation. The author has an hindex of 4, co-authored 5 publications receiving 87 citations.
Papers
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Journal ArticleDOI
New design of cold finger for sample preparation in open system: Determination of Hg in biological samples by CV-AAS
Eliézer Quadro Oreste,Alexandre de Jesus,Richard Macedo de Oliveira,Márcia M. Silva,Mariana Antunes Vieira,Anderson Schwingel Ribeiro +5 more
TL;DR: In this article, the authors used cold vapor atomic absorption spectrometry (CV-AAS) for the determination of Hg in biological samples by using a simple and inexpensive system for sample digestion.
Journal ArticleDOI
Evaluation of sample preparation methods for the determination of As, Cd, Pb, and Se in rice samples by GF AAS
Richard Macedo de Oliveira,Ana Clara Nascimento Antunes,Mariana Antunes Vieira,Aline Lisbôa Medina,Anderson Schwingel Ribeiro +4 more
TL;DR: In this article, a comparative evaluation of three different methods for sample preparation in rice for As, Cd, Pb, and Se determination by graphite furnace atomic absorption spectrometry (GF AAS) is presented.
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Sample preparation methods for determination of Cd, Pb and Sn in meat samples by GFAAS: use of acid digestion associated with a cold finger apparatus versus solubilization methods
Eliézer Quadro Oreste,Richard Macedo de Oliveira,Adriane Medeiros Nunes,Mariana Antunes Vieira,Anderson Schwingel Ribeiro +4 more
TL;DR: In this paper, three sample preparation methods for the determination of Cd, Pb and Sn in meat by Graphite Furnace Atomic Absorption Spectrometry (GFAAS): acid digestion, solubilization with tetramethylammonium hydroxide and formic acid.
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Determination of Hg in Biological Samples and Ethanol Fuel by Photochemical Vapor Generation after Pre-Concentration in a Gold Trap
Eliézer Quadro Oreste,Richard Macedo de Oliveira,Anderson Schwingel Ribeiro,Talal Suleiman Mahmoud,Mariana Antunes Vieira +4 more
TL;DR: In this paper, the photochemical vapor generation (PVG) coupled with atomic absorption spectrometry and a pre-concentration step with an Au column was used for the determination of Hg in biological samples and ethanol fuel.
Journal ArticleDOI
New design of mini PTFE vessels for sample preparation in micro scale: determination of Cd, K, Mg and Na in biological sample.
Camila Mizette Oliz,Alexander Ossanes de Souza,Camila Corrêa Pereira,Richard Macedo de Oliveira,Aline Lisbôa Medina,Mariana Antunes Vieira,Anderson Schwingel Ribeiro,Adriane Medeiros Nunes +7 more
TL;DR: In this paper, the authors presented a study involving the development of a new mini polytetrafluoroethylene (PTFE) vessel project for biological sample preparation in micro scale in closed system with microwave radiation for subsequent determination of Cd, K, Mg and Na by atomic spectrometry techniques.