Examples of such methods are: gas or liquid chromatography, titration methods, photometric methods, voltammetric methods.

Examples of such methods are: gas or liquid chromatography, titration methods, photometric methods, voltammetric methods.

In photometric methods, particle recognition is based on the difference in reflectivity of different minerals.

At the end a sample is taken, weighed and the mass fraction is determined with different methods (photometric methods, gas chromatography, and extraction).

While there exist photometric methods for ammonium, they are rather time consuming (up to 90 min. reaction time).