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Full Description

Application to products containing only nitrogenous copounds which are directly determinable by the Kjeldahl method. The method consists in destructing of organic matter by sulphuric acid in the presence of a catalyst, rendering of the reaction product alkaline, distillation and titration of the liberated ammonia.

 

Document History

  1. ISO 1871:2009


    Food and feed products - General guidelines for the determination of nitrogen by the Kjeldahl method

    • Most Recent
  2. ISO 1871:1975

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    Agricultural food products -- General directions for the determination of nitrogen by the Kjeldahl method

    • Historical Version