ผลิตภัณฑ์อาหาร เครื่องดื่ม อาหารสัตว์
เอกสารมาตรฐาน
สหรัฐอเมริกา
AOAC
2019.09
Total Proteinogenic Amino Acids and Taurine in Infant Formula and Adult/Pediatric Formula: Precolumn Derivatization and UHPLC
2019 (2023)
Final Action
13
AOAC 2023 Online Ch. 50.15.03
Samples are hydrolyzed in 6 M HCl for 24 h at 110 ± 5°C in presence of phenol, 3,3′-dithiodipropionic acid (DTDPA) and the internal standard norvaline. Phenol is added to prevent halogenation of tyrosine. DTDPA is added to convert cysteine and cystine to S-2-carboxyethylthiocysteine (CYSx), and derivatized samples are quantified against DTDPA derivatized calibration standard ...