Rapid separation of humic acid in fresh waters by coprecipitation and flotation Masataka HiraideFeng-Lian RenAtsushi Mizuike Original Papers Pages: 137 - 142
Simultaneous determination of iron(III) and cobalt(II) withN-phenylcinnamohydroxamic acid and thiocyanate by extraction and spectrophotometry Selezion AfeworkiBhagwan Singh Chandravanshi Original Papers Pages: 143 - 152
Polarographic behaviour of salicylaldehyde-2-pyridylhydrazone and its copper(II) complex Ali Z. Abu ZuhriMaher A. Abu-EidJamal S. Shalabi Original Papers Pages: 153 - 161
A comparative study of trace enrichment of chlorophenols in water by extraction with C6 and C8 alkanes and by C18 reversed-phase adsorption Sanja FinglerVlasta DrevenkarŽelimira Vasilić Original Papers Pages: 163 - 175
Experimental evidence for the surface change of solid state copper ion-selective electrodes in chloride medium Etelka G. HarsányiKlára TóthMaria F. Ebel Original Papers Pages: 177 - 186
Determination of thallium in natural waters by electrothermal atomic absorption spectrometry Ann de RuckCarlo VandecasteeleRichard Dams Original Papers Pages: 187 - 193
Determination of niobium and tantalum in some ores and special alloys by inductively coupled plasma atomic emission spectrometry Jose Enrique Sanchez UriaCesar Garcia OrtizAlfredo Sanz-Medel Original Papers Pages: 195 - 202
Indirect polarographic microdetermination of chlorine or bromine in organic compounds Mouayed Q. Al-AbachiElham S. Salih Original Papers Pages: 203 - 207
Preconcentration of trace metals from salt solutions using thiuram disulphide as collector Ernest BeinrohrHelena HofbauerováMiroslav Čakrt Original Papers Pages: 209 - 216
Photometric determination of palladium with the inclusion complex 1,2-Diaminoanthraquinone-β-cyclodextrin as ligand Francisco Garcia SanchezMiguel Hernandez LopezEduardo de Gracia Villodres Original Papers Pages: 217 - 224
A simple colorimetric method for the assay of penicillin G salt and penicillamine by oxidation with iodate Amir BesadaNabil B. Tadros Original Papers Pages: 225 - 228
Microcoulometric determination of protonation constants of nuphar alkaloids Stanisław GłąbUrszula Nowicka Original Papers Pages: 229 - 236
Extraction-spectrophotometric determination of lead in heavy metal salts with cryptand (2.2.2) and eosin Walenty SzczepaniakBernard Juskowiak Original Papers Pages: 237 - 242
Routine catalytic determination of trace amounts of cobalt in small urine samples Alexander A. AlexievMaria G. Angelova Original Papers Pages: 243 - 247
Iodometric determination of aryldialkylamine-N-oxides Abdul-Hussain KhuthierAbdul K. S. Al-KazzazDarwish Amin Original Papers Pages: 249 - 252
Announcement 1989 European Winter Conference on Plasma spectrochemistry, January 8–14, 1989, Reutte, Tyrol/Austria News Section Pages: 253 - 253