Ultraviolet Detectors
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Utilização de detecção por espalhamento de luz evaporativo para a análise de produtos naturais
The interest in the use of evaporative light scattering detector (ELSD) for the analysis of different classes of natural products has grown over the years. This is because this detector has become an excellent alternative compared to other types of detectors, such as the refractive index detector and the ultraviolet (UV) detector. This review describes the b
Química Nova. Publicado em: 2012
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2. Gamma-induced modification on optical band gap of CR-39 SSNTD
Effect of gamma irradiation on optical absorption of nuclear track detectors like CR-39 was studied in different absorbed doses using ultraviolet-visible (UV-VIS) spectroscopy. The existence of the peaks, their shifting and broadening as a result of gamma irradiation has been discussed. The width of the tail of localized states in the band gap (Eu) was evalu
Brazilian Journal of Physics. Publicado em: 2008-12
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3. The effect of heat treatment and storage time in the formation of cholesterol oxides and alteration of the fatty acids composition in eggs. / Efeito do processamento termico e tempo de estocagem na formação de oxidos de colesterol e na alteração da composição de acidos graxos em ovos.
A new method was determined for the simultaneous determination of cholesterol and cholesterol oxides in eggs, using high performance liquid chromatography (HPLC) with ultra-violet (UV) and refractive index (RI) detectors. External standardisation was used for quantification and the cholesterol and cholesterol oxides were confirmed by liquid chromatography in
Publicado em: 2006
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4. CHARACTERIZATION OF THE ELECTRON INDUCED UV EMISSION IN THIN FILM MATERIALS / CARACTERIZAÇÃO DA EMISSÃO DE RADIAÇÃO NA FAIXA DE UV INDUZIDA POR ELÉTRONS EM MATERIAIS EM FORMA DE FILMES FINOS
O objetivo deste projeto foi a montagem de um sistema que permitisse a caracterização de novos materiais em forma de filmes finos para aplicações em sistemas com detectores de UV, concentrando a nossa pesquisa na caracterização da radiação emitida por alguns filmes finos irradiados com um feixe de elétrons. A utilização de uma Micro-Channel Plate
Publicado em: 2005
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5. Analises cromatograficas de misturas de compostos de formula CxCLyBrz(x=1 e 2), ativos ou sem atividade
This thesis deals with the development of analytical methods for compounds with formula Cx Cly Brz (x = 1 &2), either radioactive or not. Instrumental methods were established, as well as experimental conditions, minimum detectable quantities and the limitations of each process. The separation and detection of CCl4, CCl3Br, CCl2Br2 CClBr3, CBr4, C2Cl6, C2Br6
Publicado em: 1982