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AOX (Adsorbable Organic Halogens) is a most useful group parameter used to estimate the total quality of dissolved halogenated organic compounds in a water sample/

The analytical principal of the technique presented here is based on the adsorption of halogenated organic compounds onto activated carbon, thus separating then from inorganic halide interferences, pyrolysis of the adsorbed halogenated compounds in a vertical furnace and transformation of the halogens into hydrogen halide (HX).

HX is allowed to react in the microcoulometric cell with silver ions. The microcoulometric detector maintains a constant silver ion concentration using a solid silver electrode and the current produced is a measure of the organic halides adsorbed on the activated carbon and expressed as organically bound chloride (æg/I).

the present study aimed at the evaluation of the reliability of the method and the performance of a new computer-assisted instrumentation (DANI AOX-Analyser 70.10), testing the precision and accuracy of measurements on spiked water samples and optimizing the working conditions to obtain higher stability and lower blank levels. vels.

Additional information

Authors: BIANCHI M, Instituto dee'Ambiente, Centro Comune di Ricerca, Ispra (IT);PASTURENZI M, Instituto dee'Ambiente, Centro Comune di Ricerca, Ispra (IT);MUNTAU H, Instituto dee'Ambiente, Centro Comune di Ricerca, Ispra (IT)
Bibliographic Reference: EUR 18750 IT (1999) 77 pp.
Availability: Available from the European Commission
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