1. Prüfung und Herstellung haft- und abriebfester Schichten für die Dünnschicht-Chromatographie

   • Egon Stahl

   Originals Pages: 673 - 678

2. Kinetic optimization of capillary supercritical fluid chromatography using carbon dioxide as the mobile phase

   • S. R. Springston
   • M. Novotny

   Originals Pages: 679 - 684

3. Paper chromatography of some chelating reagents containing sulfonic groups in liquid-liquid anion exchange systems

   • S. Przeszlakowski
   • H. Wydra

   Originals Pages: 685 - 691

4. Gas chromatographic analysis of xylidine isomers on heteroaromatic compounds

   • A. Ono

   Originals Pages: 692 - 694

5. Diffusion coefficients from stopped-flow gas chromatography

   • N. A. Katsanos
   • G. Karaiskakis
   • A. Lycourghiotis

   Originals Pages: 695 - 698

6. Headspace gas chromatographic determination of aromatic hydrocarbons in natural and waste water

   • B. V. Stolyarov

   Originals Pages: 699 - 703

7. A simple, sensitive, and specific HPLC amperometric screening method for trace levels of sulphonamides in liver, kidney, and muscle tissues

   • M. A. Alawi
   • H. A. Rüssel

   Originals Pages: 704 - 706

8. Determination of average molecular polarizabilities of polycyclic aromatic hydrocarbons directly from retention indices

   • H. Lamparczyk
   • D. Wilczyńska
   • A. Radecki

   Originals Pages: 707 - 708

9. Improved quantitative thin-layer chromatographic method for the separation of cobalamin derivatives

   • G. Szepesi
   • J. Molnár

   Originals Pages: 709 - 711

10. Stabilization of a standard gas mixture generator with diffusion tubes

    • L. Torres
    • J. Mathieu
    • J. Namiesnik

    Short Communication Pages: 712 - 713

11. Book reviews

    • C. B. F. Rice
    • M. B. Evans

    BookReview Pages: 714 - 714

12. Announcements

    Announcement Pages: 714 - 720

13. New products

    Announcement Pages: 720 - 724