Fachbereich 12 - Chemie und Pharmazie
Institut für Anorganische und Analytische Chemie

Prof. Dr. J. Andersson

Sulfur occurs in many fossil fuels in rather large amounts. This causes problems in the refining process through poisining of catalysts and in the environment through the formation of sulfur oxides on combustion. Modern refineries can remove the sulfur in a catalytic process leading to low-sulfur fuels but in higher-boiling fractions it is very resistant. An important are of research is the study of which compounds are particularly difficult to desulfurize. In gasoline and diesel we have achieved a very good characterization, but in vacuum residues the analytical problems are enormously more difficult, since compounds over a mass range of several thousand Daltons are present.

A further research area is the analysis of phenols which occur in many areas - in the environment as degradation products of various precursors, in fossil fuels, in human tissues from exposure to aromatic compounds, etc. Because of their polarity, they are not always easy to analyze correctly. We are developing methods to enable their analysis in much smaller sample volumes as well as faster and more reproducibly. Basically the phenols are derivitized using ferrocenecarboxylic acid chloride and the phenols detected gas chromatographically using atomic emission detection on the iron line which shows very low detection limits. Other phenols, frequently called polyphenols, occur in beer and other plant-based foods and have been demonstrated to possess beneficial health properties. However, in beer they can also participate in clouding of the beverage on standing which is unwanted. These compounds are difficult to analyze because of the complex matrix of beer and of the many similar compounds present, but liquid chromatography coupled with mass spectrometry shows much promise.

Beteiligte Wissenschaftler:

Prof. J. Andersson, Dr. Sherif El-Gayar (University of Alexandria), Dr. Francois Haulle (Institut francais du petrole), Dr. Abdelrahman Hegazi (University of Alexandria), Sripada Kishore, Dr. Stephane Kressmann (Institut francais du petrole), Sefan Loch-Ahring (Veltins Brauerei), Hendrik Müller, Bendedikte Roberz, Thomas Schade, Dr. Wolfgang Schrader (Max Planck Institut für Kohlenforschung), Frank Wasinski

Veröffentlichungen:

J.T. Andersson, T. Schade, H. Müller, "Separation of Aromatic Sulfur Heterocycles from Aromatic Hydrocarbons by Use of a Palladium Ion Complex", Abstract of Papers, Fuel Chemistry Division Preprints 2002, 47 (1), American Chemical Society, Washington, D.C., 115-116

T. Schade, B. Roberz, J.T. Andersson, "Polycyclic Aromatic Sulfur Heterocycles in Desulfurized Diesel Fuels and Their Separation on a Novel Palladium(II)-Complex Stationary Phase", Polycyclic Aromatic Compounds, 2002, 22, 311-320

J.T. Andersson, "Some unique properties of gas chromatography coupled with atomic-emission detection", Analytical and Bioanalytical Chemistry 2002, 373, 344-355

A.B. Ross, J.M. Jones, S. Chaiklangmuang, M. Pourkashanian, A. Williams, K. Kubica, J.T. Andersson, M. Kerst, P. Danihelka, K.D. Bartle, "Measurement and prediction of the emission of pollutants from the combustion of coal and biomass in a fixed bed furnace", Fuel 2002, 81, 571-582

U. Weis, J.T. Andersson "Synthesis of Fluorinated Polycyclic Aromatic Hydrocarbons through a Photochemical Cyclization", Polycyclic Aromatic Compounds, 2002 22 , 71-85

W. Schräder, J.T. Andersson, "Fast and Direct Method for Measuring 1-Octanol-Water Partition Coefficients Exemplified for Six Local Anesthetics", Journal of Pharmaceutical Sciences, 2001, 90, 1948-1954

J.T. Andersson, "Separation methods in the analysis of polycyclic aromatic sulfur heterocycles", in "Environmental Analysis. Handbook of Analytical Separations, Vol. 3" (W. Kleiböhmer, Ed.), Elsevier, Amsterdam, 2001, 75-98.

M. Kerst, J.T. Andersson, "Microwave-assisted extraction of polycyclic aromatic compounds from coal", Fresenius Journal of Analytical Chemistry 2001, 370, 970-972

J. Rolfes, J.T. Andersson, "Determination of Alkylphenols after Derivatization to Ferrocenecarboxylic Acid Esters with Gas Chromatography-Atomic Emission Detection", Analytical Chemistry, 2001, 73, 3073-3082

J.T. Andersson, W. Schräder, F. Traulsen, S. Werlich, "Synthesis of Seven Trimethyldibenzothiophenes", Polycyclic Aromatic Compounds", 2001, 18, 351-360

W. Kaminsky, C. Mennerich, J.T. Andersson, S. Götting, "Pyrolysis of polychloroprene rubber in a fluidised-bed reactor - product composition with focus on chlorinated aromatic compounds", Polymer Degradation and Stability 2001, 71, 39-51