1. Working party on analytical chemistry (WPAC)

   • Federation of European Chemical Societies (FECS)
   • Lauri Niinistö
   • R. Kellner

   Analytical Chemistry Pages: 557 - 558

2. Development of a definitive method for iodine speciation in aquatic systems

   • Christiane Reifenhäuser
   • Klaus G. Heumann

   Original Papers Pages: 559 - 563

3. Bleidner vapour phase extraction technique for the determination of organochlorine compounds in lake sediments

   • I. Schuphan
   • W. Ebing
   • H. -J. Pachur

   Original Papers Pages: 564 - 566

4. Signal summation in simultaneous ET-AAS for lowering the detection limits — direct trace determination in sea-water

   • H. Berndt
   • G. Schaldach

   Original Papers Pages: 567 - 570

5. A galvanic gas sensor using poly (ethylene oxide) complex of silver trifluoromethane sulphonate electrolyte

   • Kunio Nagashima
   • Katsushi Meguro
   • Toshiyuki Hobo

   Original Papers Pages: 571 - 574

6. Extraction studies of copper with mesityl oxide

   • G. S. Desai
   • V. M. Shinde

   Original Papers Pages: 575 - 577

7. Separation of titanium, iron and aluminium on a chelating resin with benzoylphenylhydroxylamine group and application to bauxite and clay

   • Jyotirmoy Das
   • Maya Pobi

   Original Papers Pages: 578 - 581

8. Extraction systems of flame atomic absorption determination of trace impurities in high purity nickel salts

   • E. Vassileva
   • S. Arpadjan
   • V. Vassileva

   Original Papers Pages: 582 - 585

9. Differential pulse polarographic determination of l-lactate with a soluble enzyme preparation

   • Kiyoshi Hasebe
   • Satoshi Hikima
   • Hitoshi Yoshida

   Original Papers Pages: 586 - 588

10. Application of differential pulse polarography for trace determination of polycytidylic acid in absence and presence of some metal ions

    • Y. M. Temerk
    • M. M. Kamal
    • M. S. Ibrahim

    Original Papers Pages: 589 - 592

11. Extractive separation of vanadium and its spectrophotometric determination with acetylacetone after reduction by dithionite

    • R. S. Chauhan
    • L. R. Kakkar

    Short Communications Pages: 593 - 593

12. Chromium(III) diaqua complexes as acid-base indicators

    • F. A. El Seify
    • R. M. Saleh

    Short Communications Pages: 594 - 595

13. New books

    BookReview Pages: 596 - 598

14. Abstracts

    • W. Czysz
    • R. H. S.
    • F. Kreuzig

    Abstract Pages: 599 - 646