Determination of theanine in tea and instant tea in solid form using high-performance liquid chromatography
NORMA vydaná dňa 10.1.2017
Označenie normy: ISO 19563:2017
Dátum vydania normy: 10.1.2017
Počet strán: 13
Približná hmotnosť: 39 g (0.09 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: ISO 19563:2016 specifies a high-performance liquid chromatographic (HPLC) method for the determination of theanine content in tea (Camellia sinensis). It is applicable to both tea and instant tea samples. Separation of L- and D-theanine is not possible using this method; however, the L-enantiomer is the major form in tea.