Distillation: 1. Clean up the distillation unit with ammonium-free distilled water before running a sample. 2. Dilute the sample with 50 mL distilled ammonia-free water and add 50 mL 40% (w/v) sodium hydroxide solution to the sample tube. 3. To run a sample, attach a digestion tube to the distillation apparatus and place a conical flask containing 50 mL 496 boric acid solution as a receiving solution with a fev drops of mixed indicator with the tip of the condenser dipping below the surface c the solution. 4. Distill and collect the ammonia on boric acid (3 minutes) Titration: