Hong, J.* ; Maguhn, J. ; Freitag, D. ; Kettrup, A.
Detection of volatile organic peroxides in indoor air.
Fresen. J. Anal. Chem. 371, 961-965 (2001)
Menzinger, F. ; Schmitt-Kopplin, P. ; Frommberger, M. ; Freitag, D. ; Kettrup, A.
Partial-filling micellar electrokinetic chromatography and non-aqueous capillary electrophoresis for the analysis of selected agrochemicals.
Fresen. J. Anal. Chem. 371, 25-34 (2001)
Gawlik, B.M.* ; Martens, D. ; Henkelmann, B. ; Schramm, K.-W. ; Kettrup, A. ; Muntau, H.*
River sediment (S-37) : A new analytical quality control material ensuring comparability of chlorinated hydrocarbon analysis during an international environmental study in China.
Fresen. J. Anal. Chem. 367, 232-240 (2000)
Gawlik, B.M.* ; Martens, D. ; Schramm, K.-W. ; Kettrup, A. ; Lamberty, A.* ; Muntau, H.*
On the presence of PCDD/Fs and other chlorinated hydrocarbons in the second generation of the European Reference Soil Set - the EUROSOILS.
Fresen. J. Anal. Chem. 368, 407-411 (2000)
Zimmermann, R. ; Heger, H.J. ; Kettrup, A. ; Nikolai, U.*
Direct observation of the formation of aromatic pollutants in waste incineration flue gases by on-line REMPI-TOFMS laser mass spectrometry.
Fresen. J. Anal. Chem. 366, 368-374 (2000)
Achatz, S. ; Lörinci, G. ; Hertkorn, N. ; Gebefügi, I. ; Kettrup, A.
Disturbance of the determination of aldehydes and ketones: Structural elucidation of degradation products derived from the reaction of 2,4-dinitrophenylhydrazine (DNPH) with ozone.
Fresen. J. Anal. Chem. 364, 141-146 (1999)
Risse, U. ; Flammenkamp, E. ; Kettrup, A. ; Vandendriessche, S.*
Certification of contents of aromatic hydrocarbons in charcoal tubes - CRM 562.
Fresen. J. Anal. Chem. 363, 33-37 (1999)
Schick, B. ; Risse, U. ; Kettrup, A.
Generation of test gases from volatile and semivolatile organic compounds (VOC/SVOC).
Fresen. J. Anal. Chem. 364, 709-713 (1999)
Wolf, M. ; Teichmann, G. ; Hoque, E. ; Szymczak, W. ; Schimmack, W.
Copper speciation in aqueous solutions of fulvic acid and related molecular weight distributions.
Fresen. J. Anal. Chem. 363, 596-599 (1999)
Zimmermann, R. ; Heger, H.J. ; Kettrup, A.
On-line monitoring of traces of aromatic-, phenolic- and chlorinated components in flue gases of industrial scale incinerators and cigarette smoke by direct-inlet laser ionization-mass spectrometry (REMPI-TOFMS).
Fresen. J. Anal. Chem. 363, 720-730 (1999)
Lîntschinger, J. ; Schramel, O. ; Kettrup, A.
The analysis of antimony species by using ESI-MS and HPLC-ICP-MS.
Fresen. J. Anal. Chem. 361, 96-102 (1998)
Lustig, S. ; Zang, S.* ; Michalke, B. ; Schramel, P. ; Beck, W.M.*
Platinum determination in nutrient plants by inductively coupled plasma mass spectrometry with special respect to the hafnium oxide interference.
Fresen. J. Anal. Chem. 357, 1157-1163 (1997)
Michalke, B.
Quality control in speciation investigations.
Fresen. J. Anal. Chem. 350, 2-6 (1994)
Günther, W.G. ; Lintelmann, J. ; Rose, E. ; Kettrup, A.
Behaviour of Polycyclic Aromatic Hydrocarbons and Triazine Herbicides in Water and Aquifer Material of a Drinking Water Recharge Plant. III: Investigations of the Behaviour of Triazine Herbicides During the Underground Passage.
Fresen. J. Anal. Chem. (1993)
Oxynos, K. ; Schladot, J.D. ; Schmitzer, J. ; Backhaus, F. ; Kettrup, A.
Characterisation of Chlorinated Hydrocarbons in a third Generation Candidate Fish Reference Material (Limanda limanda) Prepared under Cryogenic Conditions.
Fresen. J. Anal. Chem. 345, 238-239 (1993)
Rose, E. ; Lintelmann, J. ; Günther, W.G. ; Kettrup, A.
Behaviour of Polycyclic Aromatic Hydrocarbons and Triazine Herbicides in Water and Aquifer- Material of a Drinking Water Recharge Plant. II: Polycyclic Aromatic Hydrocarbons (PAH) in Surface Water of the Ruhr and in Ground Water.
Fresen. J. Anal. Chem. 346, 995-999 (1993)
Rose, E.* ; Martens, D.* ; Lintelmann, J. ; Kicinski, H.G.* ; Günther, W.J.* ; Kettrup, A.
Behaviour of polycyclic aromatic hydrocarbons and triazine herbicides in water and aquifer material of a drinking water recharge plant - IV. PAHs in the solid phase.
Fresen. J. Anal. Chem. 347, 44-51 (1993)
Rose, E. ; Lintelmann, J. ; Günther, W.J. ; Kettrup, A.
Behaviour of polycyclic aromatic hydrocarbons and triazine herbicides in water and aquifer material of a drinking water recharge plant - II. Polycyclic aromatic hydrocarbons (PAHs) in surface water of the ruhr and in ground water.
Fresen. J. Anal. Chem. 346, 995-999 (1993)
Schramel, P. ; Xu, L. ; Knapp, G. ; Michaelis, M.
Multi-elemental Analysis in Biological Samples by on-line Preconcentration on 8- hydroxyquinoline-cellulose Microcolumn coupled to Simultaneous ICP-AES.
Fresen. J. Anal. Chem. 345, 600-606 (1993)
Schramel, P. ; Hasse, S.
Destruction of Organic Material by Pressurized Microwave Digestion.
Fresen. J. Anal. Chem. 346, 794-799 (1993)
Schramel, P. ; Hasse, S.
Destruction of organic materials by pressurized microwave digestion.
Fresen. J. Anal. Chem. 346, 794-799 (1993)
Schramel, P. ; Xu, L. ; Knapp, G.* ; Michaelis, M.R.A.*
Multi-elemental analysis in biological samples by on-line preconcentration on 8-hydroxyquinoline-cellulose microcolumn coupled to simultaneous ICP-AES.
Fresen. J. Anal. Chem. 345, 600-606 (1993)
Michalke, B. ; Münch, D.C. ; Schramel, P.
Advanced Quality Control for Zinc Speciation Investigations in Human Breast Milk.
Fresen. J. Anal. Chem. 344, 306-310 (1992)
Michalke, B. ; Münch, D.C. ; Schramel, P.
Advanced quality control for zinc speciation investigations in human breast milk.
Fresen. J. Anal. Chem. 344, 306-310 (1992)
Schramel, P. ; Xu, L.
On-line preconcentration of arsenic from water samples with an anion-exchanger column coupled to a hydride generation ICP system.
Fresen. J. Anal. Chem. 343, 373-377 (1992)
Xu, L. ; Schramel, P.
Determination of Gold in Sludge and Soil by Sequential ICP-AES After Preconcentration and Separation with Thiol-Cotton Fibre.
Fresen. J. Anal. Chem. 342, 179-182 (1992)
Zanco, M. ; Pfister, G. ; Kettrup, A.
A new HPLC method for the simultaneous determination of fluazifop-butyl and fluazifop in soil samples.
Fresen. J. Anal. Chem. 344, 39-41 (1992)
Zucheng, J. ; Schramel, P.
Determination of trace amounts of molybdenum in water samples by inductively coupled plasma atomic emission spectrometry after cobalt-dithiocarbamate coprecipitation.
Fresen. J. Anal. Chem. 343, 600-603 (1992)
Schramel, P. ; Xu, L.
Determination of arsenic, antimony, bismuth, selenium and tin in biological and environmental samples by continuous flow hydride generation ICP-AES without gas-liquid separator.
Fresen. J. Anal. Chem. 340, 41-47 (1991)
Giese, U. ; Stenner, H. ; Ludwig, E. ; Kettrup, A.
Determination of Chlorinated Hydrocarbons in Single and Multi Component Test Gases.
Fresen. J. Anal. Chem. 338, 610-614 (1990)
Giese, U.* ; Stenner, H.* ; Ludwig, E.M. ; Kettrup, A.
Determination of chlorinated hydrocarbons in single and multi component test gases.
Fresen. J. Anal. Chem. 338, 610-614 (1990)
Rosner, G. ; Hötzl, H. ; Winkler, R.
Simultaneous Radiochemical Determination of Plutonium, Strontium, Uranium, and Iron Nuclides and Application to Atmospheric Deposition and Aerosol Samples.
Fresen. J. Anal. Chem. 338, 606-609 (1990)
Hengstmann, R. ; Hamann, R. ; Weber, H. ; Kettrup, A.
Comparison of Different Methods of Extraction for the Determination of Polychlorinated Dibenzo- p-dioxins in Soil.
Fresen. J. Anal. Chem. 335, 982-986 (1989)
Parlar, H.A.
Geochemical induced degradation of environmental chemicals.
Fresen. J. Anal. Chem. 319, 114-118 (1984)
Schmidt, W.F. ; Dietl, F.
Bestimmung von Blei in Boden- und Sedimentaufschlüssen und -extrakten mit der flammenlosen Atomabsorption in Zirkonium-beschichteten Graphitrohren.
Fresen. J. Anal. Chem. 303, 385-388 (1980)
Schmidt, W.F. ; Dietl, F.
Bestimmung von Cadmium in Boden- und Sedimentaufschlüssen und -extrakten mit der flammenlosen Atomabsorption in Zirkonium-beschichteten Graphitrohren.
Fresen. J. Anal. Chem. 295, 110-115 (1979)