1. Editorial

   • Wilhelm Fresenius
   • Ingo Lűderwald

   EditorialNotes Pages: A9 - A9

2. Preconcentration of hydrophilic and hydrophobic pesticides from aqueous solutions and extraction of residues using the polymeric sorbent Wofatit Y 77

   • W. Dedek
   • K. D. Wenzel
   • J. Männig

   Original Papers Pages: 201 - 206

3. Comparison of amperometric and UV-spectrophotometric monitoring in the HPLC analysis of pesticides

   • S. Yao
   • A. Meyer
   • G. Henze

   Original Papers Pages: 207 - 211

4. Characterization of cationic surfactant markers and their abiotic degradation products by CGC-EI/PICI MS

   • M. Valls
   • J. M. Bayona

   Original Papers Pages: 212 - 217

5. Evaluation of a passive sampler for airborne formaldehyde

   • N. Binding
   • U. Witting

   Original Papers Pages: 218 - 222

6. The palladium/silver membrane focusing injector — A new inlet system for thermal desorption capillary gas chromatography

   • Christof Lanzerstorfer
   • Hans Puxbaum

   Original Papers Pages: 223 - 225

7. Universal method for X-ray fluorescence analysis of glasses, rocks, refractories and raw materials

   • Günther Medicus
   • Gerhard Ackermann

   Original Papers Pages: 226 - 229

8. Determination of stainless steel constituents in plastics

   • P. Hoffmann
   • G. Paller
   • U. Stingl

   Original Papers Pages: 230 - 234

9. Application of the slurry technique to biological materials: a survey of literature

   • Zully A. de Benzo
   • Manuelita Velosa
   • Amparo Salvador

   Original Papers Pages: 235 - 239

10. Development of a combined ultra- and diafiltration technique for use in speciation analysis of protein-bound cadmium in plants

    • Kirsten Lange-Hesse
    • Lothar Dunemann
    • Georg Schwedt

    Original Papers Pages: 240 - 244

11. Thallium determination in biological materials by radiochemical neutron activation analysis

    • G. Henke

    Original Papers Pages: 245 - 248

12. Determination of coumarin anticoagulant rodenticide residues in animal liver by high-performance liquid chromatography

    • Wenche Langseth
    • Ulf Nymoen

    Original Papers Pages: 249 - 252

13. Simple, rapid and non-destructive detection and determination of phosphines and phosphine oxides in solution by ¹H and ³¹P NMR

    • Teobald Kupka
    • Andrzej Wawer
    • P. S. Zacharias

    Original Papers Pages: 253 - 257

14. Determination of glutathione, glutathione disulphide, ascorbic acid and dehydroascorbic acid in tissues by reversed-phase liquid chromatography with electrochemical detection

    • Emin Sofic
    • Peter Riederer
    • Günther Heuschneider

    Original Papers Pages: 258 - 260

15. Determination of l-lactate by differential pulse polarography with covalently immobilized enzyme on Chitopearl

    • Kiyoshi Hasebe
    • Satoshi Hikima
    • Hitoshi Yoshida

    Original Papers Pages: 261 - 263

16. Determination of paracetamol and methocarbamol in a pharmaceutical preparation using second derivative spectrophotometry

    • Sedef Kir
    • Cihat Şafak
    • Aytekin Temizer

    Short Communication Pages: 264 - 264

17. Erratum

    Erratum Pages: 265 - 265