The Commission of the European Communities presents with this volume the proceedings and the conclusions of the second European Symposium on the analysis of organic micropollutants in water. This symposium has been organized within the framework of the Concerted Action "Analysis of Organic Micropollutants in Water". This research programme is jointly implemented by the European Communities and Norway, Portugal, Spain, Sweden, Switzerland and Yugoslavia within the framework of a COST (Cooperation Scientifique et Technique) agreement. The project, also known as COST Project 64b bis, aims at coordinating all relevant research in this field in the participating countries. An effort is made to improve methods and techniques for the identification and quantitative determination of organic compounds present in all types of water. The symposium permitted to review the results achieved during the past three years of research in the following areas: - Sampling and sample treatment - Gas-chromatography Separation of non-volatile compounds, in particular high performance liquid chromatography (HPLC) - Mass-spectrometry - Data processing - Specific analytical problems, in particular the analysis of organic halogens and phenolic compounds. The volume gives a rather complete overview of the activities in this field in Europe. We are confident that it constitutes a valuable contribution to solving the important problems posed by the huge number of already identified or yet unknown organic pollutants in water. The Commission of the European Communities wishes to express their sincere thanks to the co-organizers, the National Board for Science and Technology, Dublin and An Foras Forbartha, Dublin.

by.- Session I - Sampling and Sample Treatment.- Recent concepts in sampling methodology.- A new method for the quantitative analysis of organochlorine pesticides and polychlorinated biphenyls.- Concentration and identification of the main organic micro-pollutants classes in waters.- Recovery of organic micropollutants.- Influence of humus with time on organic pollutants and comparison of two analytical methods for analysing organic pollutants in humus water.- Improved accumulation of organophosphates from aqueous media by formation of ion-associates with tetraphenylarsonium cation.- The use of ECD and FID fingerprint techniques for the evaluation of river water purification contaminated with organic pollutants.- Lekkerkerk.- Session II - Gas-Chromatography.- Sampling techniques for capillary GC.- Recent developments of selective detectors in GC.- Progress in column technology.- Recent developments in capillary column preparation.- Techniques for quantitation and identification of organic micropollutants by high resolution gas chromatography and element specific emission spectroscopy.- Applications in gas chromatography.- The use of fused-silica capillary columns in gas chromatography and gas chromatography/mass spectrometry.- The determination of linear PTGC retention indices for use in environmental organics analysis.- Session III - Separation and Analysis of Non-Volatile Compounds.- Developments in selective detectors for HPLC.- Kopplung eines Hochleistungschromatographen mit einem Massenspektrometer.- Identification of non-volatile organic compounds in water.- Routine HPLC of polynuclear aromatic hydrocarbons.- Evaluation of a mass detector for HPLC determination of organic compounds in water.- Determination of polycyclic aromatic hydrocarbons (PAH's) at the lowng/1 level in the Biesbosch water storage reservoirs (Neth.) for the study of the degradation of chemicals in surface waters.- Assessment of a moving belt type HPLC-MS interface with respect to its use in organic water pollution analysis.- Session IV - Mass-Spectrometry.- Apport de la spectrométrie de masse avec collisions (CID/MS/MS) àl'étude des micropolluants organiques.- Session V - Data Processing.- Software systems for mass spectrometry - Remarks in view of GC/MS analysis of water pollutants.- Compilation of an inventory of organic pollutants in the aqueous environment.- Status of the computerized compilation of mass-spectra of organic pollutants.- Current status of the compilation of reference data.- Session VI - Specific Analytical Problems.- A. Organic halogens.- Determination of organic halogens; a critical review of sum parameters.- Volatile halogenated hydrocarbons in river water, ground water, drinking water and swimming-pool water in the Federal Republic of Germany.- Simultaneous determination of total purgable organo-chlorine, -bromine and -fluorine compounds in water by ion-chromato-graphy.- Etude des trihalomethanes dans l'eau potable de Barcelone - Evolution de l'efficacité des filtres à charbon actif.- Analysis of trihalomethanes formed during drinking water chlorination.- B. Phenolic and other compounds.- Determination of phenolics in the aquatic environment.- Analysis of alkylphenols in an aqueous matrix containing aromatic hydrocarbons.- Analysis of nitrogenous organic substances in water.- The electroanalysis of organic pollutants in aquatic matrices.- Determination of nonylphenols and nonylphenolethoxylates in secondary sewage effluents.- Determination of phenols in water by HPLC.- Surfactants survey in the surface waters in theParis-area.- CONCLUSIONS by the Coordinators of the Working Parties.- List of Participants.- Index of authors.