1. Editorial

   • Frank Lube

   EditorialNotes Pages: 3 - 4

2. Design and application of a post-column extraction system compatible with miniaturized liquid chromatography

   • J. A. Apffel
   • U. A. Th. Brinkman
   • R. W. Frei

   Originals Pages: 5 - 10

3. The preparation of analytically stable, immobilized stationary phase coatings on colums packing materials

   • L. Ghaoui
   • H. Shanfield
   • A. Zlatkis

   Originals Pages: 11 - 14

4. Ion pair chromatography: A new approach to dynamic equilibrium

   • M. Dreux
   • M. Lafosse
   • P. Agbo-Hazoume

   Originals Pages: 15 - 17

5. Lipophilicity determination of some 3,5-dinitro-benzoic-acid esters on unimepregnated cellulose layer

   • T. Cserháti

   Originals Pages: 18 - 20

6. Gas-liquid chromatography of isopropylidene-glucose and glucose as their trimethylsilyl derivatives

   • R. Novina

   Originals Pages: 21 - 22

7. Calibration in TLC/HPTLC using the Michaelis-Menten function

   • S. Ebel
   • D. Alert
   • U. Schaefer

   Originals Pages: 23 - 27

8. Gas chromatographic-spectrometric identification of some polycyclic nitrogen-containing compounds in coal tar

   • V. P. Dmitrikov
   • Yu. V. Fedorov
   • V. M. Nabivach

   Originals Pages: 28 - 30

9. Coupling of chromatography and NMR part 5: Analysis of high-boiling gas-chromatographic fractions by on-line nuclear magnetic resonance

   • H. Herzog
   • J. Buddrus

   Originals Pages: 31 - 33

10. Optimization of the extraction conditions of amino acid dabsyl derivatives

    • T. Wolski
    • W. Goŀkiewicz
    • G. Bartuzi

    Originals Pages: 33 - 36

11. Role of the solvent in thin-layer chromatography of steroids on alumina

    • S. M. Petrović
    • L. A. Kolarov
    • Julijana A. Petrović

    Originals Pages: 37 - 40

12. Changes of the affinity between fungal proteins and vanillin bonded to thermally modified porous glass support

    • A. L. Dawidowicz
    • J. Łobarzewski

    Originals Pages: 41 - 43

13. Correlation of the retention data of polyaromatic hydrocarbons obtained on various stationary phases used in normal- and reversed-phase liquid chromatography

    • K. Jinno
    • K. Kawasaki

    Short Communication Pages: 44 - 46

14. Thinlayer-chromatography — Column liquid chromatography: Partners or competitors?

    • K. K. Unger

    Report Pages: 46 - 46

15. Comments on the use of alumina in HPLC

    • K. Unger

    Letters to the Editor Pages: 47 - 48

16. Announcements

    Announcement Pages: 51 - 57

17. New products

    Announcement Pages: 57 - 57