The Hach Ammonia Combination Electrode measures ammonia gas or ammonium ions in aqueous solutions that have been converted to gas by the addition of a strong base. The electrode is a complete electrochemical cell consisting of a glass pH electrode and a reference electrode.
The gas-permeable membrane separates the sample from a thin layer of electrolyte that is pressed between the pH bulb and the membrane. At high pH, ammonium is converted to ammonia gas. The gas diffuses through the membrane and causes a pH change in the thin layer of electrolyte. The potential across the pH glass changes as a result of the pH change and the electrode measures the change in potential. The measured pH change is proportional to the ammonia concentration in the solution.
The ammonia electrode will measure ammonia gas or ammonium ion (converted to gas by strong base) in a variety of aqueous samples. Applications include water, wastewater, boiler feedwaters, fertilizers, biological samples, fish tanks, and more.
Electrochemical cell consisting of a glass pH electrode and a reference electrode
Gas-permeable membrane that separates the sample from a thin layer of electrolyte
Measure ammonia gas or ammonium ion in a variety of aqueous samples
What's in the Box:
(1) sensION 51927 combination ammonia ISE
(3) Ammonia membrane modules
(1) Electrode internal fill solution (50 mL)
(1) User Manual.