Reference number
ISO 3188:1978
International Standard
ISO 3188:1978
Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method
Edition 1
1978-08
Read sample
ISO 3188:1978
8379
Published (Edition 1, 1978)
This publication was last reviewed and confirmed in 2019. Therefore this version remains current.

ISO 3188:1978

ISO 3188:1978
8379
Language
Format
CHF 42
Convert Swiss francs (CHF) to your currency

Abstract

The found value only includes free amino acids, compounds producing amino acids on hydrolysis and ammonium compounds. The principle consists in destruction of organic matter by sulphuric acid in the presence of a compound catalyst (see ISO 1871), alkalization of the reaction products, distillation of the liberated ammonia and collection in a boric acid solution, followed by titration with a standard volumetric sulphuric acid solution. The method applies to contents greater than 0,01 % (m/m). For products with contents less than 0,025 % (m/m), see ISO 5378.

General information

  •  : Published
     : 1978-08
    : International Standard under systematic review [90.20]
  •  : 1
     : 3
  • ISO/TC 93
    67.180.20 
  • RSS updates

Life cycle

Got a question?

Check out our Help and Support