Ammonia vs. Ammonium – what is the difference between these . . . - Hach Ammonia and ammonium are different forms of nitrogen The major factor that determines the proportion of ammonia to ammonium in water is pH The activity of the ammonia is also influenced by ionic strength and temperature It is important to remember as un‐ionized NH 3 can be harmful to aquatic organisms, while ionized ammonium is basically harmless The chemical equation that drives the
Chemistry Explained: Hardness - Hach Traditionally, either murexide indicator (ammonium purpurate) or Eriochrome Blue-Black R indicator is followed by titration with EDTA CalVer 2 Calcium Indicator has been developed by Hach to replace these indicators CalVer 2 (hydroxy naphthol blue) is more sensitive and has a sharper end point color change
What are the possible interferences with the Hydrogen Peroxide . . . - Hach Method information: The first reagent is the ammonium molybdate solution It consists of molybdate and sulfuric acid The molybdate is a catalyst for the reaction, and the acid brings the pH down, which is optimal for the test Then the Sulfite 1 reagent is added This reagent contains potassium iodide and starch (starch iodine redox titration )
What does the Amtax sc analyzer actually measure? - Hach The Amtax sc analyzer adds Sodium Hydroxide (NaOH) to adjust the pH and convert ammonium ions (NH4+) to gaseous Ammonia (NH3) which passes through an Ammonia gas selective membrane and causes a pH shift of an electrolyte solution