GB/T 15400-2018
Determination of tryptophan in feeds
GB/T 25735-2010
Feed additive - L-Tryptophan
GB 5009.294-2023
DB37/T 1423-2009
HG/T 5804-2021
D-(-)-para-hydroxyphenylglycine
GB 21034-2017
Feed additive-Calcium salt of hydroxyl analogue of methionine
HG/T 6250-2023
HG/T 3936-2007
D(-)Alpha-Parahydroxyphenylglycine Dane Salt(Methyl Potassium)
KS M 8420-2012(2023)
L-Tryptophan
DB15/T 2037-2020
QB/T 5633.4-2022
KS M 8420-2012(2018)
L-Tryptophan
GB/T 19371.2-2007
Determination of methionine hydroxy analogue in feeds - High-performance liquid chromatography
GB/T 21034-2007
Feed additive—Methionine hydroxy calcium
GB/T 15400-1994
Determination of tryptophan in feedstuffs—Spectrophotometry
ISO 13904:2016
Animal feeding stuffs — Determination of tryptophan content
BS EN ISO 13904:2016
Animal feeding stuffs. Determination of tryptophan content
\u0413\u041e\u0421\u0422 32201-2013
Feeds, compound feeds. Method for determination of tryptophan
SN/T 0858-2000
Method for the determination of tryptophan in pollen for import and export
2005\u00a0No. 2630
The Tryptophan in Food (England) Regulations 2005