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| Iodate, chlorite and bromate are separated on a column filled witha low capacity ion exchanger consisting of inert cores of styrene /divinylbenzene copolymer to which tetramethyl ammonium groups have been applied. A sodium carbonate / sodium hydrogencarbonate solutionis used as eluent. The separated ions are detected by measuring thespecific (electric) conductance of the liquid flow. By placing a membrane suppressor after the separation column, the cations in the sample and the sodium ions from the eluent are exchanged for the hydronium ions (H3O +). As a result, the specific conductivity of the eluent liquid is greatly reduced by the formation of H2CO3. Also, due to the higher specific conductivity of the hydrogen ion, a significantly higher sensitivity is obtained with respect to the remaining cations. |
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| Matrices qualified by the Dutch RvA: | Drinking water, Groundwater, Surface water |
| Reporting limit: | 0.5 μg/l, matrix dependent |
| Measurement uncertainty: | 40% |
| Sustainability: | 28 days
, if conserved with Ethylenediamine
|
| Sampling bottle: | Plastic
, white
, 125 ml
, conservation with Ethylenediamine
|
