Ammonia vs. Ammonium – what is the difference between these
Dec 1, 2022 · 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 …
Chemistry Explained: Hardness - Hach
Jul 15, 2024 · 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 …
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 …
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What is the best way to prevent contamination when doing TKN and
Aug 6, 2022 · Ammonia is very volatile, and if it is in the air and contacts an acidic solution it will turn into ammonium and become part of the solution. -One obvious source of concern is the ammonium …
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 …
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Nutrients Featured Ammonium Articles What does the Amtax sc analyzer actually measure? For the Amtax sc and Phosphax sc what amount of reagents, standards, and electrodes are required …
Chemistry Explained: Chemical Oxygen Demand (COD) - Hach
Oct 26, 2022 · The final amount of dichromate is most commonly determined by direct titration using ferrous ammonium sulfate as the titrant and “ferroin” (1,10-phenanthroline ferrous sulfate) as the …
CSI Specifications: AMTAX sc Ammonium Analyzer - Hach
Complete engineering CSI specifications makes including the Amtax sc in your project easy. Includes editable Word and PDF format.
Chemistry Explained: Silica - Hach
Aug 6, 2022 · Some forms of silica (usually polymeric) will not react with ammonium molybdate and must be digested with sodium bicarbonate to be converted to a reactive form. Silicic acid reacts with …