Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, French

Published date

08-01-1978

Publisher

International Organization for Standardization

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.

DocumentType	Standard
Pages	3
ProductNote	THIS STANDARD ALSO REFERS TO ISO 1227/ADD2
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
NF EN ISO 3188 : 1994	Identical
NBN EN ISO 3188 : 1994	Identical
NEN EN ISO 3188 : 1994	Identical
NS EN ISO 3188 : 1ED 1994	Identical
I.S. EN ISO 3188:1995	Identical
PN EN ISO 3188 : 2000	Identical
SN EN ISO 3188 : 1994	Identical
UNI EN ISO 3188 : 1995	Identical
SS-EN ISO 3188:1995	Identical
UNE-EN ISO 3188:1995	Identical
BS EN ISO 3188:1994	Identical
EN ISO 3188:1994	Identical
DIN EN ISO 3188:1994-10	Identical
NFV 03 607 : 1979	Identical

PREN ISO 20483 : DRAFT 2012	CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD (ISO/DIS 20483:2012)
DIN EN ISO 20483:2014-03	CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD (ISO 20483:2013)
I.S. EN ISO 20483:2013	CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD (ISO 20483:2013)
DIN EN ISO 20483 E : 2014	CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD (ISO 20483:2013)
ISO 5378:1978	Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrophotometric method
UNI EN ISO 20483 : 2014	CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD
12/30251275 DC : 0	BS EN ISO 20483 - CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD
UNE-EN ISO 20483:2014	Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013)
BS EN ISO 20483:2013	Cereals and pulses. Determination of the nitrogen content and calculation of the crude protein content. Kjeldahl method
BS EN ISO 5378:1994	Starches and derived products. Determination of nitrogen content by the Kjeldahl method. Spectrometric method
ISO 20483:2013	Cereals and pulses — Determination of the nitrogen content and calculation of the crude protein content — Kjeldahl method
EN ISO 5378:1994	Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
EN ISO 20483:2013	Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013)