ISI 24-1e Determination of Protein by Kjeldahl
Return 1. Scope The method is applicable to starch, starch hydrolysate and starch syrups. LT 24 Jan.. 1967 Rev. LT 03 Sep 1999 2. Principle Destruction of organic matter by sulphuric acid. N is liberated as ammonia, distilled, collected and titrated. 3. Apparatus 3.1 Analytical balance weighing to the nearest 0.1 mg. 3.2 Kjeldahl distillation assembly with 500 ml Kjeldahl flask, pear-shaped glass bulb, 50 ml - 200 ml dropping funnel, Splash head, 1000 ml distillation flask, condenser and 500 ml conical flask (collector) 3.3 Electrical heater Quickfit 280 MC Use an inclined digestion stand. 4. Reagents 4.1 CuS