Phone: (011) 7541-421, 3409-301, 3409-335, 6547-293, 3409-310
E-mail: Standards sales: prodaja@iss.rs Education: iss-edukacija@iss.rs Information about standards: infocentar@iss.rs
Stevana Brakusa 2, 11030 Beograd
Main menu

SRPS EN ISO 3188:2008

Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method (ISO 3188:1978)

Apr 23, 2008
Apr 23, 2008

General information

90.93     Oct 13, 1999

ISS

E034-4

European Norm

67.180.20  

Serbian  

Buying

Published

Language in which you want to receive the document.

Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS ISO 3188:2002

NOW

PUBLISHED
SRPS EN ISO 3188:2008
90.93 Standard confirmed
Oct 13, 1999

Related project

Adopted from EN ISO 3188:1994

Adopted from ISO 3188:1978 IDENTICAL