DIN CEN/TS 16233-2
Foodstuffs - HPLC method for the determination of xanthophylls in fish flesh - Part 2: Identification of the enantiomer ratio of astaxanthin; German version CEN/TS 16233-2:2011
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 09/01/2011