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Vanadium is recognized worldwide as the most abundant metallic constituent in petroleum. It is causing undesired side effects in the refining process, and corrosion in oil-fired power plants.Expand
  • Maria Goreti Rodrigues Vale, Isabel Cristina Ferreira Damin, +6 authors Uwe M. Heitmann
  • Chemistry
  • 2004 (First Publication: 1 August 2004)
  • Abstract Several sample preparation methods have been investigated for the direct determination of nickel in crude oil using graphite furnace atomic absorption spectrometry (GF AAS). Xylene was foundExpand
  • Bernhard Welz, Fábio Grandis Lepri, +4 authors Helmut Becker-Ross
  • Chemistry, Medicine
  • Analytica chimica acta
  • 2009 (First Publication: 1 August 2009)
  • 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 determination of these non-metals hasExpand
    Abstract The determination of phosphorus by graphite furnace atomic absorption spectrometry at the non-resonance line at 213.6 nm, and the capability of Zeeman-effect background correction (Z-BC) toExpand
  • Uwe M. Heitmann, Bernhard Welz, Daniel Lázaro Gallindo Borges, Fábio Grandis Lepri
  • Chemistry
  • 2007 (First Publication: 1 November 2007)
  • Abstract In high-resolution continuum source atomic absorption spectrometry (HR-CS AAS) with a pixel detector, such as a charge-coupled device array for signal registration, the absorbance A not onlyExpand
    Abstract The literature about applications of high-resolution continuum source atomic absorption spectrometry (HR-CS AAS) with electrothermal atomization is reviewed. The historic development ofExpand
    A method is proposed that makes possible determining total and “thermally stable” vanadium in crude oil without prior separation, and to calculate “volatile” vanadium by difference. The volatileExpand
    Abstract Phosphorus is not one of the elements that are typically determined by atomic absorption spectrometry, but this technique nevertheless offers several advantages that make it attractive, suchExpand
  • Morgana B. Dessuy, Maria Goreti Rodrigues Vale, +4 authors Uwe M. Heitmann
  • Chemistry
  • 2008 (First Publication: 1 February 2008)
  • Abstract The artifacts created in the measurement of phosphorus at the 213.6-nm non-resonance line by electrothermal atomic absorption spectrometry using line source atomic absorption spectrometryExpand