Application of ion-chromatography for the determination of the organic-group parameters AOCl, AOBr and AOI in water.
A method of differential AOX-analysis, i.e. the simultaneous determination of AOCl, AOBr and AOI is described. Individual steps of the method including enrichment at activated carbon, combustion in an oxygen stream and ion-chromatographic detection were optimized. In most cases quantitative recoveries of various organic Cl, Br and I containing substances of different polarity and structure were obtained. The method was applied to the determination of AOX-fractions in municipal and hospital wastewater. A good agreement between conventional coulometric and the described ion-chromatographic determination was found. High concentrations up to 130 microg/L I of organic iodine compounds were measured in the influent and effluent of a municipal treatment plant in Berlin and up to 10 mg/L I in a hospital waste-water.
Oleksy-Frenzel
J
J
Technical University of Berlin, Dept. of Water Quality Control, Germany.
Wischnack
S
S
Jekel
M
M
D002852:Chromatography, Ion Exchange / Q000379:methods*; D006846:Hydrocarbons, Halogenated / Q000032:analysis*; D014867:Water / Q000737:chemistry*
D006846:Hydrocarbons, Halogenated; D014867:Water