International Standard
ISO 3188:1978
Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method
Reference number
ISO 3188:1978
Edición 1
1978-08
International Standard
Vista previa
ISO 3188:1978
8379
No disponible en español
Publicado (Edición 1, 1978)
Esta norma se revisó y confirmó por última vez en 2019. Por lo tanto, esta versión es la actual.

ISO 3188:1978

ISO 3188:1978
8379
Idioma
Formato
CHF 42
Convertir Franco suizo (CHF) a tu moneda

Resumen

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.

Informaciones generales

  •  : Publicado
     : 1978-08
    : Norma Internacional confirmada [90.93]
  •  : 1
     : 3
  • ISO/TC 93
    67.180.20 
  • RSS actualizaciones

Ciclo de vida

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)