Search Results - "dos Santos, Hilda C"

Determination of Copper, Iron, Nickel, and Zinc in Ethanol Fuel by Flame Atomic Absorption Spectrometry Using On-Line Preconcentration System by Teixeira, Leonardo S. G., Bezerra, Marcos de A., Lemos, Valfredo A., Santos, Hilda C. dos, Jesus, Djane S. de, Costa, Antônio C. S.

“…In this work, an on-line system for preconcentration and determination of copper, iron, nickel, and zinc at µg L −1 level by flame atomic absorption…”
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Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon by dos Santos, Hilda C., Korn, Maria G.A., Ferreira, Sérgio L.C.

“…The present paper proposes a procedure for separation, preconcentration and determination of trace amounts of molybdenum in geological samples by using atomic…”
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Multivariate calibration in Fourier transform infrared spectrometry as a tool to detect adulterations in Brazilian gasoline by Teixeira, Leonardo S.G., Oliveira, Fábio S., dos Santos, Hilda C., Cordeiro, Paulo W.L., Almeida, Selmo Q.

“…In the present work, Fourier transform infrared spectroscopy (FTIR) in association with multivariate chemometrics classification techniques was employed to…”
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Application of factorial designs and Doehlert matrix in optimization of experimental variables associated with the preconcentration and determination of vanadium and copper in seawater by inductively coupled plasma optical emission spectrometry by Ferreira, Sérgio L.C, Queiroz, Adriana S, Fernandes, Marcelo S, dos Santos, Hilda C

“…In the present paper a procedure for preconcentration and determination of vanadium and copper in seawater using inductively coupled plasma optical emission…”
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The influence of Cu, Fe, Ni, Pb and Zn on gum formation in the Brazilian automotive gasoline by Teixeira, Leonardo S.G., Souza, Jurema C., dos Santos, Hilda C., Pontes, Luiz A.M., Guimarães, Paulo R.B., Sobrinho, Eledir V., Vianna, Regina F.

“…In this research work, the effect of different concentrations of copper, iron, lead, zinc and nickel ions on the tendency for gum formation in gasohol fuel is…”
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The determination of molybdenum in water and biological samples by graphite furnace atomic spectrometry after polyurethane foam column separation and preconcentration by Ferreira, Sérgio L.C., dos Santos, Hilda C., Campos, Reinaldo C.

“…A system for molybdenum separation and enrichment aiming its determination in water and biological samples by graphite furnace atomic absorption spectrometry…”
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Characterization and determination of the thermodynamic and kinetic properties of the adsorption of the molybdenum(VI)–calmagite complex onto active carbon by Ferreira, Sérgio L.C., Andrade, Heloysa M.C., dos Santos, Hilda C.

“…The extraction of the Mo(VI)–calmagite complex by adsorption onto active carbon is investigated in the present paper. Thermodynamic and kinetic properties and…”
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Procedures of Separation and Pre-concentration for Molybdenum Determination Using Atomic Spectrometry-a Review by Ferreira, Sérgio L. C., dos Santos, Hilda C., Costa, Antônio C. S., de la Guardia, Miguel

“…The literature concerning the improvement of atomic and ionic procedures for molybdenum determination through separation and pre-concentration were updated…”
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