Ammonium-Nitrogen determination

Liquids and solids

  1. Weigh about 2 grams of a representative sample into a tared Erlenmeyer flask.
  2. Record weight on flask to 2 decimal places. Add 20 mL 2 M KCl. Shake for 30 min. Filter sample into digestion tube. Transfer weight to tube. Enter weight into distillation unit. Distill Sample. Titrate with H2SO4 solution using the boric acid indicator.
  3. To make 2 M KCl, weigh 298.24 g KCl into a 2 L volumetric flask. Dilute to volume with deionized H20.
  4. Report to 3 decimal places for liquids. Report 2 decimal places for solids.

Ref: Delaware.