Search Results - "Welz, Bernhard"

Optimization of fluorine determination via the molecular absorption of gallium mono-fluoride in a graphite furnace using a high-resolution continuum source spectrometer by Gleisner, Heike, Welz, Bernhard, Einax, Jürgen W.

“…The determination of fluorine using the molecular absorption of gallium mono-fluoride (GaF) at the 211.248 nm rotational line has been optimized using a…”
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Determination of lead in biomass and products of the pyrolysis process by direct solid or liquid sample analysis using HR-CS GF AAS by Duarte, Álvaro T., Borges, Aline R., Zmozinski, Ariane V., Dessuy, Morgana B., Welz, Bernhard, de Andrade, Jailson B., Vale, Maria Goreti R.

“…A method has been developed for the determination of lead in biomass, bio-oil, pyrolysis aqueous phase, and biomass ashes by high-resolution continuum source…”
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Determination of phosphorus, sulfur and the halogens using high-temperature molecular absorption spectrometry in flames and furnaces—A review by Welz, Bernhard, Lepri, Fábio G., Araujo, Rennan G.O., Ferreira, Sérgio L.C., Huang, Mao-Dong, Okruss, Michael, Becker-Ross, Helmut

“…The literature about the investigation of molecular spectra of phosphorus, sulfur and the halogens in flames and furnaces, and the use of these spectra for the…”
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A comparison of laser ablation-inductively coupled plasma-mass spectrometry and high-resolution continuum source graphite furnace molecular absorption spectrometry for the direct determination of bromine in polymers by de Gois, Jefferson S., Van Malderen, Stijn J.M., Cadorim, Heloisa R., Welz, Bernhard, Vanhaecke, Frank

“…This work describes the development and comparison of two methods for the direct determination of Br in polymer samples via solid sampling, one using laser…”
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Method development for the determination of chromium and thallium in fertilizer samples using graphite furnace atomic absorption spectrometry and direct solid sample analysis by Borges, Aline R., François, Luciane L., Becker, Emilene M., Vale, Maria Goreti R., Welz, Bernhard

“…A method has been developed for the determination of chromium and thallium in fertilizer samples using line source graphite furnace atomic absorption…”
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Determination of sulfur in crude oil using high-resolution continuum source molecular absorption spectrometry of the SnS molecule in a graphite furnace by Cadorim, Heloisa R., Pereira, Éderson R., Carasek, Eduardo, Welz, Bernhard, de Andrade, Jailson B.

“…An analytical method for the determination of sulfur, as the tin mono-sulfide (SnS) molecule, in crude oil using high-resolution continuum source graphite…”
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A simple sample preparation procedure for the fast screening of selenium species in soil samples using alkaline extraction and hydride-generation graphite furnace atomic absorption spectrometry by Schneider, Mauana, Pereira, Éderson R., Castilho, Ivan N.B., Carasek, Eduardo, Welz, Bernhard, Martens, Irland B.Gonzaga

“…This work proposes a simple procedure for the determination of selenium species in soil samples using an ultrasound-assisted alkaline extraction and hydride…”
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High-Resolution Continuum Source Atomic and Molecular Absorption Spectrometry-A Review by Welz, Bernhard, Morés, Silvane, Carasek, Eduardo, Vale, Maria Goreti R., Okruss, Michael, Becker-Ross, Helmut

“…The present article gives an overview over the historic development, the instrumentation, the special features, and the applications of high-resolution…”
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Method development for the determination of Cd, Cu, Ni and Pb in PM2.5 particles sampled in industrial and urban areas of Greater Cairo, Egypt, using high-resolution continuum source graphite furnace atomic absorption spectrometry by Shaltout, Abdallah A., Boman, Johan, Welz, Bernhard, Castilho, Ivan N.B., Al Ashkar, Emad A., Gaita, S.M.

“…Energy-dispersive X-ray fluorescence (EDXRF) spectrometry is not adequate for the determination of some potentially hazardous trace elements, such as Cd, Cu,…”
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Sample Preparation for the Determination of Metals in Food Samples Using Spectroanalytical Methods-A Review by Andrade Korn, Maria das Graças, da Boa Morte, Elane Santos, Batista dos Santos, Daniele Cristina Muniz, Castro, Jacira Teixeira, Barbosa, José Tiago Pereira, Teixeira, Alete Paixão, Fernandes, Andrea Pires, Welz, Bernhard, dos Santos, Wagna Piler Carvalho, Nunes dos Santos, Eduardo Batista Guimarães, Korn, Mauro

“…The present article gives an overview of recent publications and modern techniques of sample preparation for food analysis employing atomic and inorganic mass…”
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Development of an analytical method for the determination of arsenic in gasoline samples by hydride generation–graphite furnace atomic absorption spectrometry by Becker, Emilene M., Dessuy, Morgana B., Boschetti, Wiliam, Vale, Maria Goreti R., Ferreira, Sérgio L.C., Welz, Bernhard

“…The purpose of the present work was to optimize the conditions for the determination of arsenic in gasoline with hydride generation–graphite furnace atomic…”
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High-resolution continuum source electrothermal atomic absorption spectrometry — An analytical and diagnostic tool for trace analysis by Welz, Bernhard, Borges, Daniel L.G., Lepri, Fábio G., Vale, Maria Goreti R., Heitmann, Uwe

“…The literature about applications of high-resolution continuum source atomic absorption spectrometry (HR-CS AAS) with electrothermal atomization is reviewed…”
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Simultaneous determination of Cd and Fe in grain products using direct solid sampling and high-resolution continuum source electrothermal atomic absorption spectrometry by dos Santos, Lisia M.G., Araujo, Rennan G.O., Welz, Bernhard, Jacob, Silvana do C., Vale, Maria Goreti R., Becker-Ross, Helmut

“…Cadmium and iron are antagonistic elements in the sense that they produce different effects in the human body. Both elements have to be determined routinely in…”
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Speciation analysis of volatile and non-volatile vanadium compounds in Brazilian crude oils using high-resolution continuum source graphite furnace atomic absorption spectrometry by Lepri, Fábio G., Welz, Bernhard, Borges, Daniel L.G., Silva, Alessandra F., Vale, Maria Goreti R., Heitmann, Uwe

“…A method is proposed that makes possible determining total and “thermally stable” vanadium in crude oil without prior separation, and to calculate “volatile”…”
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High-resolution continuum-source atomic absorption spectrometry: what can we expect? by Welz, Bernhard, Becker-Ross, Helmut, Florek, Stefan, Heitmann, Uwe, Vale, Maria Goreti R.

“…A new instrumental concept has been developed for atomic absorption spectrometry (AAS), using a high-intensity xenon short-arc lamp as continuum radiation…”
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Determination of lead in sediments and sewage sludge by on-line hydride-generation axial-view inductively-coupled plasma optical-emission spectrometry using slurry sampling by dos Santos, Eder José, Herrmann, Amanda Beatriz, Frescura, Vera Lúcia Azzolin, Welz, Bernhard, Curtius, Adilson José

“…Among the “traditional” hydride-forming elements, lead is probably the most difficult, and its determination in this form has rarely been reported in the…”
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Determination of arsenic in sediments, coal and fly ash slurries after ultrasonic treatment by hydride generation atomic absorption spectrometry and trapping in an iridium-treated graphite tube by Vieira, Mariana Antunes, Welz, Bernhard, Curtius, Adilson José

“…A simple and reliable method for the determination of arsenic in sediment and in coal without sample digestion, based on hydride generation from slurry samples…”
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Determination of Cu, Mn, Ni and Sn in gasoline by electrothermal vaporization inductively coupled plasma mass spectrometry, and emulsion sample introduction by Saint'Pierre, Tatiana D., Dias, Lúcia Felicidade, Pozebon, Dirce, Aucélio, Ricardo Q., Curtius, Adilson J., Welz, Bernhard

“…Trace metals in fuels, except in the case of additives, are usually undesirable and normally they occur in very low concentrations in gasoline, requiring…”
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Method development for the determination of nickel in petroleum using line-source and high-resolution continuum-source graphite furnace atomic absorption spectrometry by Vale, Maria Goreti R, Damin, Isabel C.F, Klassen, Aline, Silva, Márcia M, Welz, Bernhard, Silva, Alessandra F, Lepri, Fábio G, Borges, Daniel L.G, Heitmann, Uwe

“…Several sample preparation methods have been investigated for the direct determination of nickel in crude oil using graphite furnace atomic absorption…”
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Determination of aluminum in highly concentrated iron samples: Study of interferences using high-resolution continuum source atomic absorption spectrometry by Bohrer, Denise, Heitmann, Uwe, Huang, Mao-dong, Becker-Ross, Helmut, Florek, Stefan, Welz, Bernhard, Bertagnolli, Denise

“…High-resolution continuum source atomic absorption spectrometry (HR-CS AAS) has been used to investigate spectral and non-spectral interferences found with a…”
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