1. To Professor Dr. Karlheinz Ballschmiter on his 60th birthday

   • Klaus G. Heumann

   Editorial Pages: 207 - 207

2. Discovery of utmost inner time precision in chromatography

   • R. E. Kaiser

   Original paper Pages: 208 - 212

3. The potential of gas chromatography with microwave-induced plasma atomic emission detection (GC-MIP-AED) as a complementary analytical technique in environmental screening analysis of aqueous samples

   • H. Frischenschlager
   • C. Mittermayr
   • M. Grasserbauer

   Original paper Pages: 213 - 221

4. Certification of the contents of five polychlorodibenzo-p-dioxins and six polychlorodibenzo furans in milk powder

   • L. G. M. T. Tuinstra
   • J. R. Startin
   • G. N. Kramer

   ORIGINAL PAPER Pages: 222 - 229

5. Multi-element characterization of high-purity titanium dioxide by neutron activation analysis

   • D. Wildhagen
   • V. Krivan

   Original Paper Pages: 230 - 238

6. Screening-method for organotins by elimination of the inorganic tin matrix using a coupling of hydride generation (HG) and transversely heated graphite atomizer-atomic absorption spectrometry (THGA-AAS)

   • H. G. Riepe
   • D. Erber
   • K. Cammann

   Original paper Pages: 239 - 243

7. Contamination by butyltin compounds in harbour porpoise (Phocoena phocoena) from the Black Sea

   • Bathini Madhusree
   • S. Tanabe
   • Bayram Öztürk

   Original Paper Pages: 244 - 248

8. Liquid chromatographic isolation of coplanar PCB congeners on an activated carbon stationary phase

   • Astrid Trost
   • W. Kleiböhmer
   • Karl Cammann

   Original paper Pages: 249 - 253

9. Levels and patterns of polychlorinated biphenyls in water collected from the San Francisco Bay and Estuary, 1993–95

   • W. M. Jarman
   • Glenn W. Johnson
   • Robert Ramer

   Original paper Pages: 254 - 260

10. Separation of polychlorinated dibenzothiophenes from polychlorinated dibenzodioxins and -furans

    • Klaus Sielex
    • J. T. Andersson

    Original paper Pages: 261 - 266

11. Comparison of liquid chromatography-mass spectrometry interfaces for the analysis of polar metabolites of benz[a]pyrene

    • Robert Koeber
    • R. Niessner
    • Josep Maria Bayona

    ORIGINAL PAPER Pages: 267 - 273

12. Ozonation of pyrene and benzo[a]pyrene in silica and soil –14C-mass balances and chemical analysis of oxidation products as a first step to ecotoxicological evaluation

    • M. Eberius
    • Anne Berns
    • Ingolf Schuphan

    Original paper Pages: 274 - 279

13. Polycyclic aromatic hydrocarbons in Ya-Er Lake (Hubei, China): sources and distribution

    • G. S. Chen
    • K.-W. Schramm
    • A. Kettrup

    Original paper Pages: 280 - 284

14. Trace analysis of epichlorohydrin in water samples

    • H.-J. Neu
    • R. Sprenger

    Original paper Pages: 285 - 287

15. Particle beam LC/MS screening of polar compounds of contaminated ground water samples from a former gas plant

    • B. Edler
    • C. Zwiener
    • F. H. Frimmel

    Original paper Pages: 288 - 292

16. Improvement of GC-MS analysis of organochlorine pesticides in sediments by use of a computer-optimized temperature program

    • H. Pichler
    • O. Gans
    • M. Grasserbauer

    ORIGINAL PAPER Pages: 293 - 297

17. Biogenic volatile organoiodine and organobromine hydrocarbons in the Atlantic Ocean from 42°N to 72°S

    • C. Schall
    • K. G. Heumann
    • G. O. Kirst

    ORIGINAL PAPER Pages: 298 - 305