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ISO 19563:2017

Determination of theanine in tea and instant tea in solid form using high-performance liquid chromatography ISO 19563:2017

Publication date:   Jan 10, 2017

General information

90.93 Standard confirmed   Jul 7, 2022

ISO

ISO/TC 34/SC 8 Tea

International Standard

67.140.10   Tea

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Published

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 19563:2017
90.93 Standard confirmed
Jul 7, 2022

REVISED BY

IN_DEVELOPMENT
ISO/PWI 19563