1. Prof. Dr. Wilhelm Fresenius on his 80. birthday

   • Ingo Lüderwald

   Editorials Pages: 507 - 508

2. Beauty and fascination of morphologies of the micro- and macrocosmos

   • Hugo M. Ortner
   • Wilhelm Birzer

   Original Papers Pages: 509 - 515

3. The shape of covariance-functions — an additional tool for the evaluation of noisy IR-spectra

   • Klaus Doerffel
   • Ulrich Kreher

   Original Papers Pages: 516 - 519

4. Multisignal calibration in optical emission spectroscopy

   • Klaus Danzer
   • Michael Wagner

   Original Papers Pages: 520 - 524

5. Quality assurance in environmental research: emissions and fate of platinum

   • Wolfhard Wegscheider
   • Michael Zischka

   Original Papers Pages: 525 - 529

6. BCR: a service to quality assurance in analytical chemistry — some experiences and achievements with regard to reference material preparation

   • B. Griepink
   • P. Quevauviller
   • S. Vandendriessche

   Original Papers Pages: 530 - 535

7. Analyses in hanging drops — A modern variant of feigl's spot tests

   • B. Neidhart
   • E. Welter

   Original Papers Pages: 536 - 538

8. Prerequisites for attaining 1:1 stoichiometry between water and iodine using dimethylformamide as solvent in coulometric Karl Fischer titrations

   • Anders Cedergren
   • Christina Orädd

   Original Papers Pages: 539 - 542

9. Comparison of stimulated-emission-pumping fluorescence dip spectrometry and conventional fluorescence spectrometry in application to supersonic jet spectrometry

   • Yoshiaki Murata
   • Cheng-Huang Lin
   • Totaro Imasaka

   Original Papers Pages: 543 - 544

10. Evaluation of an automated on-line method for generating calibration curves in inductively coupled plasma atomic emission spectrometry

    • Norman N. Sesi
    • Timothy K. Starn
    • Gary M. Hieftje

    Original Papers Pages: 545 - 549

11. Analysis of high-purity reagents using automatic on-line column preconcentration-separation and electrothermal atomic absorption spectrometry

    • Bernhard Welz
    • Michael Sperling
    • Xiaojuan Sun

    Original Papers Pages: 550 - 555

12. Potential relevance of imprecise data from solid sample analysis with graphite furnace AAS

    • U. Kurfürst

    Original Papers Pages: 556 - 559

13. Wavelength dispersion in fiber optical detection of time-resolved fluorescence

    • U. Panne
    • F. Lewitzka
    • R. Niessner

    Original Papers Pages: 560 - 563

14. Optical sensor for the pH 10–13 range using a new support material

    • Tobias Werner
    • Otto S. Wolfbeis

    Original Papers Pages: 564 - 568

15. Ion exchange at neutral carrier ion-selective electrode membranes

    • V. Horváth
    • G. Horvai
    • E. Pungor

    Original Papers Pages: 569 - 571

16. A reflectometric sensor for ammonia and hydrocarbons

    • G. Gauglitz
    • G. Kraus

    Original Papers Pages: 572 - 576

17. Studies of quaternary ammonium ion interference on potassium ion-selective electrodes

    • Andrzej Lewenstam
    • Eija Erkola
    • Alfred Lehmenkühler

    Original Papers Pages: 577 - 579

18. Biosensors using integrated optical devices

    • J. Ingenhoff
    • B. Drapp
    • G. Gauglitz

    Original Papers Pages: 580 - 583

19. In vivo and in vitro testing of microelectronically fabricated planar sensors designed for applications in cardiology

    • Ernö Lindner
    • Vasile V. Cosofret
    • Richard P. Buck

    Original Papers Pages: 584 - 588

20. Photolithographically patterned enzyme membranes for the detection of pesticides and copper(II) based on enzyme inhibition

    • Astrid Zürn
    • Helmut Müller

    Original Papers Pages: 589 - 593

21. Trends in surface and interface analysis

    • M. Grasserbauer
    • G. Friedbacher
    • G. Stingeder

    Original Papers Pages: 594 - 603

22. Comparison of different algorithms for the interferometric determination of thicknesses in the μm-range by IR-spectroscopy

    • H. M. Heise

    Original Papers Pages: 604 - 607

23. Determination of lead concentration and film thickness in electroluminescent calcium sulfide thin films by X-ray fluorescence

    • Sari Lehto
    • Lauri Niinistö
    • Inkeri Yliruokanen

    Original Papers Pages: 608 - 611

24. FTIR-Microspectroscopic detection of ultra-thin organic films on chalcogenide fibers

    • R. Kellner
    • B. Mizaikoff
    • P. Grosse

    Original Papers Pages: 612 - 614

25. Wavelength dependencies in interferometric measurements of thin protein films

    • A. Brecht
    • G. Lang
    • G. Gauglitz

    Original Papers Pages: 615 - 617

26. Separation of non UV-absorbing cations by capillary electrophoresis

    • W. Beck
    • H. Engelhardt

    Original Papers Pages: 618 - 621

27. Study of some interfering processes in the arsenic, antimony and selenium determination by hydride generation atomic absorption spectrometry

    • Maciej Walcerz
    • Ewa Bulska
    • Adam Hulanicki

    Original Papers Pages: 622 - 626

28. Studies on the UV-photolytic decomposition of some tensides and complexones inhibiting the inverse-voltammetric determination of metal ions

    • S. K. Bhowal
    • D. Saur
    • R. Neeb

    Original Papers Pages: 627 - 629

29. Fluorometric detection of heavy metals with pyrene substituted N-acylthioureas

    • M. Schuster
    • E. Unterreitmaier

    Original Papers Pages: 630 - 633

30. Separation of aminoacidato ruthenium(II) complexes by ion-pair chromatography

    • H. -J. Götze
    • W. S. Sheldrick
    • A. F. M. Siebert

    Original Papers Pages: 634 - 638

31. Investigation of the stability of metal species with respect to liquid chromatographic separations

    • G. Weber

    Original Papers Pages: 639 - 642

32. Determination of six arsenic species by high-performance liquid chromatography — hydride generation — atomic absorption spectrometry with on-line thermo-oxidation

    • M. A. López
    • M. M. Gómez
    • C. Cámara

    Original Papers Pages: 643 - 647

33. Speciation and simultaneous determination of mercury species in dolphin liver by liquid chromatography with on-line cold vapor atomic absorption spectrometry

    • F. Palmisano
    • P. G. Zambonin
    • N. Cardellicchio

    Original Papers Pages: 648 - 652

34. Speciation of Cr(III) and Cr(VI) by reversed phase high-performance liquid chromatography using UV-detection

    • C. M. Andrle
    • J. A. C. Broekaert

    Original Papers Pages: 653 - 658

35. Trace analysis and speciation of copper by application of an urease reactor

    • Georg Schwedt
    • Dirk-Oliver Waldheim
    • Kathrin Stein

    Original Papers Pages: 659 - 662

36. Trace element analysis of high-purity copper

    • G. Schulze
    • R. Martens-Menzel

    Original Papers Pages: 663 - 666

37. Spectrophotometric determination of Fe(II) and total iron with 2,4,6-TRI(2′-pyridyl)-1,3,5-triazine in iron ores and related industrial products

    • Jörg Flock
    • Karl Heinz Koch

    Original Papers Pages: 667 - 670

38. Process analysis of electroless nickel deposition baths using optical spectroscopies

    • J. Bürck
    • E. Gantner
    • H. J. Ache

    Original Papers Pages: 671 - 675

39. Quantitative Raman and ESCA characterization of titania supported tungsten catalysts

    • Roger B. Quincy
    • Marwan Houalla
    • David M. Hercules

    Original Papers Pages: 676 - 682

40. Determination of arsenic in the presence of high copper concentrations using flow-injection analysis-hydride atomic absorption spectrometry

    • C. Schmidt
    • M. Bahadir

    Original Papers Pages: 683 - 685

41. Methyl mercury determination in environmental and biological reference and other materials by quality control with certified reference materials (CRMs)

    • Susanne Padberg
    • Mechthild Burow
    • Markus Stoeppler

    Original Papers Pages: 686 - 688

42. Determination of platinum in biotic and environmental samples by graphite furnace atomic absorption spectrometry after its electrodeposition into a graphite tube packed with reticulated vitreous carbon

    • E. Beinrohr
    • M. L. Lee
    • G. Tölg

    Original Papers Pages: 689 - 692

43. Platinum traces in airborne particulate matter. Determination of whole content, particle size distribution and soluble platinum

    • F. Alt
    • A. Bambauer
    • G. Tölg

    Original Papers Pages: 693 - 696

44. Pyrolysis-mass spectrometry of whole soils, soil particle-size fractions, litter materials and humic substances: statistical evaluation of sample weight, residue, volatilized matter and total ion intensity

    • C. Sorge
    • R. Müller
    • H. -R. Schulten

    Original Papers Pages: 697 - 703

45. Determination of soil pH by use of a robotic station

    • P. Torres
    • J. A. García-Mesa
    • M. Valcárcel

    Original Papers Pages: 704 - 706

46. Pyrolysis GC/MS identification of halogenated furandiones and other products from chlorinated aqueous humic solutions

    • Fritz H. Frimmel
    • Ute Schmiedel

    Original Papers Pages: 707 - 710

47. On-line trace preconcentration / matrix separation by high-performance flow atomic spectrometry (HPF-FLAME AAS)

    • H. Berndt
    • A. Müller
    • G. Schaldach

    Original Papers Pages: 711 - 716

48. GC determination of volatile organoiodine and organobromine compounds in Arctic seawater and air samples

    • Christian Schall
    • Klaus G. Heumann

    Original Papers Pages: 717 - 722

49. Simultaneous flow injection analysis for two components with a double on-line dialyser

    • Jacobus F. van Staden

    Original Papers Pages: 723 - 727

50. Analysis of nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) in water, particularly waste water

    • C. Randt
    • R. Wittlinger
    • W. Merz

    Original Papers Pages: 728 - 731