Anions in non saline waters - Determination of Anions in Natural and Treated Waters - page 123

AMMS and CMMS micromembrane suppression; (a) monoprotic organic acids
by anion exchange; (b) diprotic organic acids by anion exchange
Source: Own files
2.14.2.4 Miscellaneous
Pearson [157] has proposed a method for determining alkalinity (and acidity) employing
fixed endpoints and involving less manipulation of samples than existing methods of
analysis. It involves calculation of alkalinity and acidity values to equivalence endpoints
from results of titrations to pH 4.5 and pH 8.3. The validity of the technique was
confirmed experimentally within a limited range of conditions, although some anomalous
results may be obtained in some waters such as those of high ionic strength.
The measurement of alkalinity in non saline water has been discussed by several other
workers [20,151,152,158-160].
2.15 Carboxylates
2.15.1 Ion chromatography
Some typical separations of anions achieved within this system are shown in Fig. 2.11.
Fig. 2.11(a),(b) illustrates ion chromatographic separations of mono and diprotic organic
acids by ion exchange using anodic AMMS and CMMS micromembrane suppressors.