ISO 1871:1975

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

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.

General information

  • Status :  Withdrawn
    Publication date : 1975-12
  • Edition : 1
  • :
    ISO/TC 34
    Food products
  • 67.050
    General methods of tests and analysis for food products

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)

Keep up to date with ISO

Sign up to our newsletter for the latest news, views and product information