Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 4
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
A compact miniaturized flow system based on low-temperature co-fired ceramic technology coupled to led mini-photometer for determination of dipyrone in pharmaceutical formulations. Repositório Alice
SUAREZ, W. T.; PESSOA NETO, O. D.; SANTOS, V. B. dos; NOGUEIRA, A. R. de A.; FARIA, R. C.; FATIBELLO-FILHO, O.; CHAMARRO, J. A..
In this work, an analytical microsystem based on LTCC (low-temperature co-fired ceramic) technology with monolithic incorporation of an optical flow cell for determination of dipyrone in pharmaceuticals is described. The detection system is based on the formation of a blue chromophore between dipyrone and Fe(III) photometrically monitored at 630 nm using a lab-made LED mini-photometer constructed with a light emitting diode as a radiation source and a Si photodiode as a detector. The lab-made mini-photometer elaborated presented a good performance in regard to high signal/noise ratio, low drift and good sensitivity. The analytical curve was linear in the dipyrone concentration range from 1.0 × 10-4 to 3.5 × 10-3 mol L-1, limit of detection of 4.5 × 10-5...
Tipo: Artigo de periódico Palavras-chave: Low temperature; Co-fired ceramic; Analytical microsystems; Dipyrone; Flow injection; LED photometer.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/959237
Imagem não selecionada

Imprime registro no formato completo
Determination of iron-porphyrin-like complexes at nanomolar levels in seawater ArchiMer
Vong, Lilita; Laes, Agathe; Blain, Stéphane.
A new method for the non-specific determination of iron-porphyrin-like complexes in natural waters has been developed. It is based on the chemiluminescent oxidation of the luminol in the presence of dioxygen (O-2) at pH 13. The method has been implemented in a FIA manifold that allowed the direct injection of seawater. The limit of detection is 0.11 nM of equivalent hemin (Fe-protoporphyrin IX). Fe2+, Fe3+, H2O2, siderophore (deferoxamin mesylate), humic acid and phytic acid did not interfere when the), were present at the concentrations expected in seawater. Metal free porphyrin and Mg, Cu, Co porphyrin complexes did not induce a significant chemiluminescent signal. Poisoned unfiltered samples could be stored for several weeks before analyses. The new...
Tipo: Text Palavras-chave: Chemiluminescence; Complexation; Flow injection; Seawater; Porphyrin; Iron.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3298.pdf
Imagem não selecionada

Imprime registro no formato completo
Multi-site detection in flow analysis: Part 3 Periodate tubular electrode with low inner volume as relocatable detector. Repositório Alice
GOMES NETO, J. A.; NOGUEIRA, A. R. de A.; BERGAMIN FILHO, H.; ZAGATTO, E. A. G.; MONTENEGRO. M. C. B. S. M; LIMA, J. L. F. C.
The approach was applied to the determination of glycerol in soaps. Determination of glycerol with parallel monitoring.Determination of sucrose with serial monitoring.
Tipo: Separatas Palavras-chave: Analise por injeção e fluxo; Glicerol; Potentiometria; Flow injection; Potentiometry; Multi-site detection; Periodate tubular electrode; Waters; Glycerol.
Ano: 1994 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/42920
Imagem não selecionada

Imprime registro no formato completo
Poliphenols spectrotometric determination in wine by flow infection analysis. Repositório Alice
FERREIRA, E. C.; SILVA, F. V.; NOGUEIRA, A. R. de A..
Resumo.
Tipo: Separatas Palavras-chave: Poliphenols; Spectrophotometric; Flow injection; Analysis; Espectrofotometro; Injecao em fluxo; Análise.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/44322
Registros recuperados: 4
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional