Flame Tube
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. A novel thermal plasma-based technology for submicronic silicon carbide production at pilot scale
Resumo Pó submicrométrico de carboneto de silício foi sintetizado em um novo reator piloto de tocha a plasma por radiofrequência. Os precursores foram pós de cinza de pirólise e sílica com tamanhos micrométricos. A taxa de massa do pó de precursor variou na faixa de 600-2500 g/h. O tempo máximo do teste foi de aproximadamente 3 h. Com o objetivo de
Cerâmica. Publicado em: 2019-01
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2. Cadmium and Lead Determination in Freshwater and Hemodialysis Solutions by Thermospray Flame Furnace Atomic Absorption Spectrometry Following Cloud Point Extraction
Cloud point extraction was employed for the separation and preconcentration of cadmium and lead prior to the determination by thermospray flame atomic absorption spectrometry. Di-2- pyridyl ketone salicyloylhydrazone (DPKSH) was used as complexing agent and the cadmium and lead complexes were extracted from the aqueous phase by the Triton X-114 surfactant. T
J. Braz. Chem. Soc.. Publicado em: 2015-03
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3. The Mutagenic Potential Caused by the Emissions from Combustion of Crude Glycerin and Diesel Fuel
This study evaluated the use of crude glycerin as an alternative of energy generation to replace the traditional fuels. The Tradescantia stamen hair mutation assay (Trad-SH) was applied to study the mutagenic effects caused by the emissions generated in the direct combustion of diesel oil and glycerin in a flame tube furnace. Tradescantia inflorescences were
Braz. arch. biol. technol.. Publicado em: 11/11/2014
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4. Ampliação do uso da técnica de espectrometria de absorção atômica utilizando tubo metálico na chama para determinação de prata / Enlarging the use of thermospray flame furnace atomic absorption spectrometry for determination of silver
Thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) uses a metallic tube on the flame of the atomic absorption spectrometer. The sample is introduced in the tube by a ceramic capillary. In the development of this method, the parameters involved were studied and the optimal conditions consist of using air as carrier at 0.4 mL min, 200 mL of s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/03/2012
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5. Direct determination of Cu, Mn, Pb, Zn in beer by thermospray flame furnace atomic absorption spectrometry.
In this work, thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) was employed for Cu, Mn, Pb, and Zn determination in beer without any sample digestion. The system was optimized and calibration was based on the analyte addition technique. A sample volume of 300 Al was introduced into the hot Ni tube at a flow-rate of 0.4 ml min 1 using 0.14
Spectrochimica Acta Part B v. 60. Publicado em: 2011
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6. Pré-concentração por extração em ponto nuvem para determinação de cádmio em amostras de bebidas por espectrometria de absorção atômica como forno tubular na chama e aerossol térmico / Preconcentration and Determination of Cadmium in Beverage Samples by Cloud Point Extraction and Thermospray Flame Furnace Atomic Absorption Spectrometry detection
In this work, it was evaluated extraction/preconcentration cloud point procedure for cadmium determination in soft drinks samples stored in polyethylene terephthalate (PET) packaging and detection by thermospray flame furnace atomic absorption spectrometry (TS -FF-AAS). For the cloud point preconcentration procedure were used Triton X-114 as surfactant, PAN
Publicado em: 2010
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7. Desenvolvimento de metodologias para determinação de Cd e Pb em amostras de lodo de esgoto e sedimentos com o emprego da espectrometria de absorção atômica com forno tubular na chama e aerossol térmico / Method development for determination of cadmium and lead in sewage sludge and sediment using thermospray flame furnace atomic absorption spectrometry
In this work, Thermospray Flame Furnace Atomic Absorption Spectrometry (TS-FF-AAS) and Flame Atomic Absorption Spectrometry (FAAS) were employed in order to propose methods for determination of total and bioavailability concentration of Cd and Pb in environmental samples. The sediments were collected in the basin of the Jundiaí river and the sewage sludge (
Publicado em: 2008
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8. Aspectos analíticos em TS-FF-AAS : estudo de interferências e aplicação para a determinação de metais em vinhos e sucos / Analytical aspects of ts-ff-aas: study of interferences and application for determinations of metals in wines and grape juices
In this work, it was evaluated the effects of interferences caused by major and minor constituents on Co, Cu and Mn atomized by flame atomic absorption spectrometry (FAAS) and by thermospray flame furnace atomic absorption spectrometry (TS-FFAAS). The main concomitants were chosen according to the typical concentrations found in foods and beverages. The liqu
Publicado em: 2007
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9. COMBUSTÃO INICIADA POR MICROONDAS E DETERMINAÇÃO EM LINHA DE CÁDMIO E CHUMBO EM PLANTAS POR ESPECTROMETRIA DE ABSORÇÃO ATÔMICA COM TUBO AQUECIDO NA CHAMA
In this work a new procedure is proposed by solid sampling flame furnace atomic absorption spectrometry after microwave induced combustion (MIC-FFAAS). The procedure was applied for the determination of cadmium and lead in botanical samples. Samples were groung, pressed and placed on a filter paper positioned on a quartz holder. The holder was placed in a gl
Publicado em: 2007
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10. DETERMINAÇÃO DE CÁDMIO E CHUMBO EM SANGUE POR ESPECTROMETRIA DE ABSORÇÃO ATÔMICA COM TUBO AQUECIDO NA CHAMA APÓS COMBUSTÃO INICIADA POR MICROONDAS
In this work a procedure for Cd and Pb determination by solid sampling flame furnace atomic absorption spectrometry after microwave induced combustion (MIC-FF-AAS) is used. Human blood samples were priory lyophilized, dried, ground, mixture with graphite, pressed and placed on a filter paper positioned on a quartz holder, that was introduced in a glass devic
Publicado em: 2007
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11. Desenvolvimento e análise de uma fornalha para aquecimento direto e indireto de ar utilizando biomassa polidispersa / Development and analysis of a furnace for both direct- and indirect air heating by using polydispersive biomass
A heat-generation system with option to direct or indirect heating of the air, that could be used in drying agricultural products or heating zootechnical facilities was developed and evaluated. The developed furnace has a heat changer with concentric countercurrent-flux tube, and it was fed polydispersive biomass by pneumatic transport or manually with bioma
Publicado em: 2007
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12. Avaliação experimental da transferência de calor em fornalha flamotubular utilizando como combustível o biodiesel e o óleo diesel / Experimental evaluation of heat transfer in a flame tube furnace using ethyl ester of vegetable oil and diesel oil
O trabalho consiste em uma análise experimental comparativa do processo de combustão e de transferência de calor ao longo de uma fornalha flamotubular. Os combustíveis utilizados são o óleo diesel e o biodiesel proveniente de óleo de fritura. Uma outra parcela deste trabalho é investigar os níveis de emissões gasosas no processo de combustão do bi
Publicado em: 2005