Cumulative determination of dissolved substances with cation exchangers

2 Cumulative determination of dissolved substances with cation exchangers 

As the water flows through a column with cation exchangers which have been converted into the hydrogen form by means of hydrochloric acid, all the cations are removed from the water and replaced by H-ions (K. E. Quentin 1955)  

The corresponding free acids are therefore present in the column effluent. Hydrogen carbonate and carbonate ions are no longer present in the effluent since free carbon dioxide has formed during the reaction with the H exchanger  

If 100 ml of water is subjected to this ion exchange process, the value yielded by titration of the effluent with 0.1-m NaOH provides the sum of the anions less the mmol value for HC03 . If the latter value, taken from hydrogen carbonate determination, is added, this yields the total mmol of the anions and hence also the cations. After the ion exchange process, the undissociated substances (e.g. H2Si03 are contained in the effluent in 

If a sample titrated in this way is subjected to cation exchange, subse- 

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