Source: WTW Measurement Systems, Inc.
The QA 110 Ammonia Analyzer Module measures ammonia by raising the pH above 12, converting all ammonium compounds
WTW Measurement Systems, Inc.Ammonia Analyzer Module measures ammonia by raising the pH above 12, converting all ammonium compounds to gaseous ammonia. The sample is conditioned with a complexing agent (e.g. EDTA) to prevent calcium precipitation. Free ammonia now diffuses through the semi-permeable Teflon membrane of the electrode, changing the pH of the internal electrolyte. This change, which is directly correlated with the NH4
-N concentration in the sample, is measured by the electrode.
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