Micro Kjeldahl method distillation apparatus

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        Micro Kjeldahl method distillation apparatus

                            Measuring nitrogen content in protein or amino acid

                                                                           〈 How to measure 〉


  1. Preprocess sample by sulfuric acid. Change all ammonium from ammonia nitrogen to ammonium sulfate. Put ammonium sulfate in flask 6.
  2. Put caustic soda in the flask 6 to change alkaline.
  3. Put sulfuric acid in flask 17 to soak tip of the tube inside.
  4. Heat flask 6 to absorb all ammonium vapors.
  5. Take out part of the absorbed liquid. Analyze ammonium ion from sulfate consumption by Neutralization titration or  Absorption spectrophotometry.


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