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
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 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
T/CASME 385-2023
T/ZNZ 127-2022
EN ISO 13904:2016
2005\u00a0No. 440
The Tryptophan in Food Regulations (Northern Ireland) 2005
2005\u00a0No. 3111 (W.\u00a0231)
The Tryptophan in Food (Wales) Regulations 2005
GB/T 42957-2023
Determination of lysine, methionine and threonine in commercial amino acid products and additive premixture feeds