Determination of theanine in tea and instant tea in solid form using high-performance liquid chromatography
STANDARD published on 10.1.2017
Designation standards: ISO 19563:2017
Publication date standards: 10.1.2017
The number of pages: 13
Approximate weight : 39 g (0.09 lbs)
Country: International technical standard
Category: Technical standards 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.