To determine the Kjeldahl nitrogen of the given sample of water.
In the presence of sulphuric acid, potassium sulphate and mercuric sulphate catalyst, the amino nitrogen of many
organic materials is converted to ammonium sulphate. After the mercury-ammonium complex, the digestible has
been decomposed by sodium thiosulphate, the ammonia is distilled from an alkaline medium and absorbed in boric
acid. The ammonia is determined colorimetrically or by titration with a standard mineral acid.
- Digestion apparatus of 800 mL capacity
- Distillation apparatus