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Decomposição assistida por radiação micro-ondas e ultravioleta de resíduos de equipamentos elétricos e eletrônicos para determinação de Br, Cd, Cr, Hg, Pb e Sb
(Universidade Federal de Santa Maria, 2017-03-09)
In this work, a method for ultraviolet and microwave-assisted wet digestion (MAWD-UV) was developed for digestion of waste electrical and electronic equipment (WEEE) for further determination of Br, Cd, Cr, Hg, Pb and Sb ...
Desenvolvimento de método de preparo de amostras baseado no efeito Maxwell-Wagner e determinação de elementos terras raras por técnicas espectrométricas
(Universidade Federal de Santa Maria, 2017-06-03)
A new method for analytical applications based on Maxwell-Wagner effect with to use of microwave radiation in closed system is proposed. Considering the interaction of carbonaceous materials with an oscillating electromagnetic ...
Decomposição de amostras de alimentos empregando ácido nítrico diluído e pressurização com diferentes gases em sistema de câmara única de reação assistida por radiação micro-ondas
(Universidade Federal de Santa Maria, 2017-03-23)
In the present work the use of a microwave-assisted wet digestion using a single reaction chamber system (MAD-SRC) at high pressure and temperature was evaluated for digesting food samples. It was evaluated the use of ...
Decomposição de carvão com elevado teor de cinzas para determinação simultânea de As, Cd, Hg, Pb e S por ICP-OES
(Universidade Federal de Santa Maria, 2015-09-21)
In this work, sample preparation methods for decomposition of coal with high ash content (14-
54%) for further simultaneous determination of As, Cd, Hg, Pb and S by inductively coupled
plasma optical emission spectrometry ...
Determinação de impurezas inorgânicas em suplementos de ferro por DSS-GF AAS
(Universidade Federal de Santa Maria, 2010-01-18)
In this work a methodology for determination of inorganic impurities (Ag, As, Cr, Mn, Ni, Pb e Sb) by direct solid sampling with graphite furnace atomic absorption spectrometry (DSS-GF AAS) in iron glycinate chelate samples ...
Determinação de mercúrio orgânico e inorgânico por CVG-GF AAS em tecido muscular de peixe após extração seletiva
(Universidade Federal de Santa Maria, 2005-05-06)
In this study a procedure for speciation analysis of Hg in muscle fish tissue was developed with us of selective extraction and determination of each species by chemical vapor generation with graphite furnace atomic ...
Determinação de elementos traços em carbeto de boro de alta pureza por SS-GFAAS e comparação estatística com resultados de diferentes procedimentos de decomposição
(Universidade Federal de Santa Maria, 2008-02-18)
In this work a procedure is proposed for determination of Al, Cr, Cu, Mg, Mn and Ni in boron carbide samples by solid sampling graphite furnace atomic absorption spectrometry (SS-GFAAS). The samples, ESK and PL360, ...
Avaliação de diferentes sistemas de extração assistida por ultrassom para determinação de As, Cd, Cr, Ni e Pb em solo e sedimento
(Universidade Federal de Santa Maria, 2016-03-10)
In this study a sample preparation method using ultrasound-assisted extraction (UAE) for further determination of As, Cd, Cr, Ni and Pb in soil and sediment by inductively coupled plasma mass spectrometry (ICP-MS) was ...
Desenvolvimento de metodologias para a especiação de arsênio em águas e matrize salinas empregando voltametria adsortiva de redissolução catódica
(Universidade Federal de Santa Maria, 2005-01-20)
The present work reports the development of methodologies for the arsenic speciation in waters and saline matrices by adsorptive cathodic stripping voltammetry (AdCSV). The determination of As(III) by AdCSV was investigated ...
Eletrodos modificados e não modificados na determinação de compostos sulfurados - um estudo comparativo
(Universidade Federal de Santa Maria, 2004-11-19)
The present study is a contribution for the electrochemical determination of the thiocompounds in aqueous solutions. The performance of different electrode surfaces as well as the introduction of modifiers in the electrolyte ...