GB/T 21979-2008 (English Version) PDF

Standard No.: GB/T 21979-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2020-07
Replace By: GB 7300.101-2019
Latest: GB 7300.101-2019

Scope: This standard specifies the technical requirements, test methods, inspection rules, labels, packaging, transportation, storage and shelf life of feed grade L-threonine products. This standard applies to feed grade L-threonine made from starch and sugar as main raw materials through fermentation and extraction. Chemical name: L-2-amino-3-hydroxybutyric acid Molecular formula: C₄H₉NO₃ Relative molecular mass: 119.12 (according to the international relative atomic mass in 2006)

GB/T 21979-2008 Referenced Document

GB 10648 Feed Label "No. 1 Amendment"*， 2020-12-24 Update
GB 13078 Hygienical standard for feeds*， 2017-10-14 Update
GB/T 13079 Determination of total arsenic in feeds*， 2022-12-30 Update
GB/T 13080 Determination of lead in feeds—Atomic absorption spectrometry*， 2018-09-17 Update
GB/T 14699.1 Feeding stuffs--Sampling
GB/T 601 Chemical reagent.Preparations of reference titration solutions*， 2016-10-13 Update
GB/T 602 Chemical reagent--Preparations of standard solutions for impurity
GB/T 603 Preparation of preparations and products used in chemical reagent test methods*， 2023-08-06 Update
GB/T 6435 Determination of moisture in feedstuffs*， 2014-07-08 Update
GB/T 6438 Animal feeding stuffs- Determination of crude ash
GB/T 6682 Water for analytical laboratory use.Specification and test methods

2019 GB 7300.101-2019 Feed additives—Part 1：Amino acids, their salts and analogues—L-Threonine
2008 GB/T 21979-2008 Feed grade.L-Threonine

GB/T 21979-2008 Feed grade.L-Threonine was changed to GB 7300.101-2019 Feed additives—Part 1：Amino acids, their salts and analogues—L-Threonine.