1. Basic equations and uncertainties in isotope-dilution mass spectrometry for traceability to SI of values obtained by this primary method

   • P. De Bièvre
   • H. S. Peiser

   Original paper Pages: 523 - 525

2. Investigation of mercury-free potentiometric stripping analysis and the influence of mercury in the analysis of trace elements lead and zinc

   • J. E. T. Andersen
   • Laust Andersen

   ORIGINAL PAPER Pages: 526 - 532

3. Determination of cadmium in indium phosphide by electrothermal atomic absorption spectrometry and ion-selective electrode potentiometry

   • M. Taddia
   • Dario Ranno
   • Roberto Fornari

   ORIGINAL PAPER Pages: 533 - 537

4. Ligand-exchange chromatographic separation of polycyclic aromatic hydrocarbons and polycyclic aromatic sulfur heterocycles on a chelating silica gel loaded with palladium (II) or silver (I) cations

   • U. Pyell
   • S. Schober
   • G. Stork

   ORIGINAL PAPER Pages: 538 - 541

5. Development of an amperometric detector for the determination of phenolic compounds

   • Hong-yuan Chen
   • Ai-min Yu
   • Dan-ke Xu

   ORIGINAL PAPER Pages: 542 - 545

6. Occurrence and distribution of polycyclic aromatic hydrocarbons (PAHs) in an agricultural ecosystem

   • D. Martens
   • J. Maguhn
   • A. Kettrup

   ORIGINAL PAPER Pages: 546 - 554

7. Extraction of humic acids from a natural matrix by alkaline pyrophosphate. Evaluation of the molecular weight of fractions obtained by ultrafiltration

   • D. Tonelli
   • Renato Seeber
   • Carlo Gessa

   ORIGINAL PAPER Pages: 555 - 560

8. Capillary gas chromatography of polychlorinated benzonitriles (PCBN)

   • Bernhard Mittermaier
   • Karlheinz Ballschmiter

   Current research note Pages: 561 - 564