Adsorption of Organic Halogens onto activated carbon is part of the procedure for analyzing Adsorbable Organic Halogens and Total Organic Halogens. This can be done according to the batch method or column method.
The batch method is suitable for all AOX sample types like (waste)water, pulp, paper, sludge, sediment, soil and salt water samples. Especially sludge and water samples containing lots of particles should be pre-treated according to this method.
The sample is filtrated under pressure through a quartz glass frit or column containing activated carbon. After filtration, the Inorganic Halogens are removed by a Nitrate wash solution. Once the Inorganic Halogens have been removed, the activated carbon together with the quartz frit or column is introduced either manually or by an autosampler into the high temperature furnace and combusted.