Electrothermal Atomic Absorption Spectrometry
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Selected minerals concentration and microbiological safety in non-carcass bovine components of “PANELADA” dish
Abstract “Panelada” is a typical dish from Brazil, made up of some bovine non-carcass components (intestine, rumen and ox feet), whose nutritional value and microbiological quality are not reported. The total contents of selected minerals were determined using flame atomic absorption spectrometry (FAAS) and electrothermal (ETAAS) for samples of raw, seas
Food Sci. Technol. Publicado em: 2020-12
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2. Determination of Copper and Cadmium in Petroleum Produced Formation Water by Electrothermal Atomic Absorption Spectrometry after Cloud Point Extraction
Cloud point extraction (CPE) in association with graphite furnace atomic absorption spectrometry (GF AAS) was proposed for preconcentration and quantification of trace amounts of copper and cadmium in samples of saline produced formation water from petroleum exploration. The procedure was based on the formation of hydrophobic complexes of the analytes with 1
J. Braz. Chem. Soc.. Publicado em: 2020-06
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3. Magnetic Nanoparticles Coated with Ionic Liquid as a Sorbent for Solid Phase Extraction of Chromium(VI) Prior to Its Determination by Electrothermal Atomic Absorption Spectrometry
A simple, sensitive and reliable method for the separation, preconcentration and determination of ultra trace amounts of chromium species has been developed. Chromium(VI) in aqueous sample was reacted with 9-phenyl-2,3,7-trihydroxy-6-fluorone to produce a chelate at pH of 5.0 and extracted onto the magnetic nanoparticles coated with the ionic liquid 1-hexade
J. Braz. Chem. Soc.. Publicado em: 2016-01
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4. Extraction and Separation of Molybdenum by Using Homogeneous Liquid-Liquid Microextraction via Flotation Assistance
Homogeneous liquid-liquid microextraction via flotation assistance (HLLME-FA) was investigated for the extraction of molybdenum from the water samples. Alizarin Red S and cetyl trimethylammonium bromide (CTAB) were used as a complexing ligand and ion-pairing reagent, respectively. The enriched analyte in the floated organic phase was determined by electrothe
J. Braz. Chem. Soc.. Publicado em: 2015-05
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5. Dispersive liquid-liquid microextraction based on solidification of floating organic drop for simultaneous separation/preconcentration of nickel, cobalt and copper prior to determination by electrothermal atomic absorption spectrometry
A dispersive liquid-liquid microextraction based on solidification of floating organic drop for simultaneous extraction of trace amounts of nickel, cobalt and copper followed by their determination with electrothermal atomic absorption spectrometry was developed. 300 µL of acetone and 1-undecanol was injected into an aqueous sample containing diethyldithioc
Quím. Nova. Publicado em: 2013
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6. Determination of metal impurities in carbon nanotubes by direct solid sampling electrothermal atomic absorption spectrometry
A determinação de Al, Cd, Co, Cr, Cu, Mg, Mn e Pb em nanotubos de carbono (CNTs) foi realizada por espectrometria de absorção atômica com atomização eletrotérmica e amostragem direta de sólidos (DSS-ET AAS, corretor de fundo com fonte de deutério). Foram avaliados os parâmetros de aquecimento, uso de Pd como modificador químico, possibilidade de
Journal of the Brazilian Chemical Society. Publicado em: 2011-06
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7. Bovine liver sample preparation and micro-homogeneity study for Cu and Zn determination by solid sampling electrothermal atomic absorption spectrometry.
Abstract This work describes a systematic study for the bovine liver sample preparation for Cu and Zn determination by solid sampling electrothermal atomic absorption spectrometry. The main parameters investigated were sample drying, grinding process, particle size, sample size, microsample homogeneity, and their relationship with the precision and accuracy
Spectrochimica Acta Part B v. 60. Publicado em: 2011
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8. Determinação de Cu e Fe em Biodiesel por Espectrometria de Absorção Atômica com Atomização Eletrotérmica e Estudo do Efeito Catalítico destes Metais sobre a Estabilidade Oxidativa do Biodiesel / Determination of Cu and Fe in Biodiesel by Absorption Spectrometry Electrothermal atomic and Study of the Effect of Catalytic Metals on the Oxidative Stability of Biodiesel
The metals content in biodiesel is directly related with the raw material used and also with the utilized biodiesel production method. In this work, an evaluation of the main metals present in biodiesel samples from different sources was done. The qualitative analysis of the metal content was assessed using the Inductively Coupled Plasma Mass Spectrometry te
Publicado em: 2011
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9. Determinación simultánea de Cr, Ni y V en orina mediante et aas
A procedure for the simultaneous determination of Cr, Ni, and V in urine by electrothermal atomic absorption spectrometry (ET AAS) was optimized by factorial design, and performed at a pyrolysis and atomization temperatures of 1300 and 2500 ºC, respectively, using 15 µg de Mg(NO3)2 as chemical modifier. Characteristics mass of 14, 6 and 220 ρg and detecti
Química Nova. Publicado em: 2011
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10. DETERMINAÇÃO DAS CONSTANTES DE ESTABILIDADE DOS COMPLEXOS FORMADOS ENTRE OS AMINOÁCIDOS CISTEÍNA, N-ACETILCISTEÍNA E LISINA COM CHUMBO EM SOLUÇÃO AQUOSA / DETERMINATION OF STABILITY CONSTANTS FOR LEAD COMPLEXES WITH CYSTEINE, N-ACETYLCYSTEINE AND LYSINE IN AQUEOUS SOLUTIONS
In this study we investigated the interaction between lead and the amino acid cysteine, lysine and N-acetylcysteine by testing long-term contact with ion exchanger resins and also the determination of stability constants. The importance of investigating the presence of lead in solutions for parenteral nutrition is related to the risk of internal contaminatio
Publicado em: 2011
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11. Arsenic determination in pharmaceutical grade barium sulfate using direct solid sampling electrothermal atomic absorption spectrometry
Um método para determinação de arsênio em BaSO4 por espectrometria de absorção atômica com aquecimento eletrotérmico e introdução de amostras sólidas (SoS-ET AAS) é descrito. Foram avaliados dois sistemas de correção de fundo (BG), deutério e efeito Zeeman (Z). Com o uso combinado de hidrogênio e Pd o BG foi diminuído. Resultados exatos e pr
Journal of the Brazilian Chemical Society. Publicado em: 2010
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12. Determinação de Selênio em água subterânea utilizando a espectrometria de absorção atômica com atomização eletrotérmica em forno de grafita (GFAAS) e geração de hidretos (HGAAS) / Determination of selenium in underground water using atomic absorption spectrometry with graphite furnace (GFAAS) and hydride generation (HGAAS)
Report carried out for CETESB in 2006 showed 80% of the 645 cities are totally or partially supplied by underground water, and for 13 river basins of São Paulo State the underground water is the priority source for potable water supply. The use of underground water in different sectors reinforces its importance and highlight the concern about their protecti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2008