1. Rapid separation of humic acid in fresh waters by coprecipitation and flotation

   • Masataka Hiraide
   • Feng-Lian Ren
   • Atsushi Mizuike

   Original Papers Pages: 137 - 142

2. Simultaneous determination of iron(III) and cobalt(II) withN-phenylcinnamohydroxamic acid and thiocyanate by extraction and spectrophotometry

   • Selezion Afeworki
   • Bhagwan Singh Chandravanshi

   Original Papers Pages: 143 - 152

3. Polarographic behaviour of salicylaldehyde-2-pyridylhydrazone and its copper(II) complex

   • Ali Z. Abu Zuhri
   • Maher A. Abu-Eid
   • Jamal S. Shalabi

   Original Papers Pages: 153 - 161

4. A comparative study of trace enrichment of chlorophenols in water by extraction with C₆ and C₈ alkanes and by C₁₈ reversed-phase adsorption

   • Sanja Fingler
   • Vlasta Drevenkar
   • Želimira Vasilić

   Original Papers Pages: 163 - 175

5. Experimental evidence for the surface change of solid state copper ion-selective electrodes in chloride medium

   • Etelka G. Harsányi
   • Klára Tóth
   • Maria F. Ebel

   Original Papers Pages: 177 - 186

6. Determination of thallium in natural waters by electrothermal atomic absorption spectrometry

   • Ann de Ruck
   • Carlo Vandecasteele
   • Richard Dams

   Original Papers Pages: 187 - 193

7. Determination of niobium and tantalum in some ores and special alloys by inductively coupled plasma atomic emission spectrometry

   • Jose Enrique Sanchez Uria
   • Cesar Garcia Ortiz
   • Alfredo Sanz-Medel

   Original Papers Pages: 195 - 202

8. Indirect polarographic microdetermination of chlorine or bromine in organic compounds

   • Mouayed Q. Al-Abachi
   • Elham S. Salih

   Original Papers Pages: 203 - 207

9. Preconcentration of trace metals from salt solutions using thiuram disulphide as collector

   • Ernest Beinrohr
   • Helena Hofbauerová
   • Miroslav Čakrt

   Original Papers Pages: 209 - 216

10. Photometric determination of palladium with the inclusion complex 1,2-Diaminoanthraquinone-β-cyclodextrin as ligand

    • Francisco Garcia Sanchez
    • Miguel Hernandez Lopez
    • Eduardo de Gracia Villodres

    Original Papers Pages: 217 - 224

11. A simple colorimetric method for the assay of penicillin G salt and penicillamine by oxidation with iodate

    • Amir Besada
    • Nabil B. Tadros

    Original Papers Pages: 225 - 228

12. Microcoulometric determination of protonation constants of nuphar alkaloids

    • Stanisław Głąb
    • Urszula Nowicka

    Original Papers Pages: 229 - 236

13. Extraction-spectrophotometric determination of lead in heavy metal salts with cryptand (2.2.2) and eosin

    • Walenty Szczepaniak
    • Bernard Juskowiak

    Original Papers Pages: 237 - 242

14. Routine catalytic determination of trace amounts of cobalt in small urine samples

    • Alexander A. Alexiev
    • Maria G. Angelova

    Original Papers Pages: 243 - 247

15. Iodometric determination of aryldialkylamine-N-oxides

    • Abdul-Hussain Khuthier
    • Abdul K. S. Al-Kazzaz
    • Darwish Amin

    Original Papers Pages: 249 - 252

16. Announcement 1989 European Winter Conference on Plasma spectrochemistry, January 8–14, 1989, Reutte, Tyrol/Austria

    News Section Pages: 253 - 253

17. Announcement Federation of European Chemical Societies

    News Section Pages: 254 - 257

18. Conference calendar

    News Section Pages: 258 - 260