NORM
ISO 1871:1975
Erscheinungsdatum: 1975 12 01
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.
Allgemeine Information zur ISO 1871:1975
Historie
Eine Übersicht über die Entwicklung der ISO 1871:1975 von 1975 bis heute.
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ISO 1871:20092009 08 14 Norm ISO 1871:2009, Ausgabe: 2009 08 14Food and feed products — General guidelines for the determination of nitrogen by the Kjeldahl method...
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ISO 1871:19751975 12 01 Norm ISO 1871:1975, Ausgabe: 1975 12 01Agricultural food products — General directions for the determination of nitrogen by the Kjeldahl me...
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