1. Comments to “Reproducibility of glass open tubular columns in a production environment-— Two years of experience”

   • J. Sevćik
   • M. J. Hartigan
   • L. S. Ettre

   Letter to the Editor Pages: 247 - 248

2. On the fallacies of the “ABT-concept”

   • G. Guiochon

   Originals Pages: 249 - 256

3. Why only 50% of the concept? Reply to Professor George Guiochon's “...fallacies of the ABT-concept...”

   • R. E. Kaiser

   Originals Pages: 257 - 259

4. Separation of urinary aromatic acids and measurement of vanilmandelic acid by high-performance liquid chromatography

   • I. Molnár
   • C. Horváth
   • P. Jatlow

   Originals Pages: 260 - 265

5. Capillary reaction gas chromatography

   • V. Pacáková
   • V. Kozlik

   Originals Pages: 266 - 273

6. Contribution to the determination of chemical composition of copolymers by gel permetation chromatography

   • Ch. Stojanov
   • Z. H. Shirazi
   • T. O. K. Audu

   Originals Pages: 274 - 281

7. Application of the headspace analysis to systems with unknown partition coefficients

   • B. V. Ioffe
   • A. G. Vitenberg

   Originals Pages: 282 - 286

8. Résolution de l'équation de bilan-matière d'une colonne chromatographique

   • H. Brusset
   • D. Depeyre
   • J. P. Petit

   Originals Pages: 287 - 294

9. Ein neues Interface für die GC/MS-Kopplung von Glaskapillarsäulen

   • H. W. Dürbeck
   • I. Büker
   • W. Leymann

   Originals Pages: 295 - 300

10. New products

    Announcement Pages: 302 - 302