ISO 19563:2017

Determination of theanine in tea and instant tea in solid form using high-performance liquid chromatography

Publication date: Jan 10, 2017

General information

Current stage: 90.93 Effective date: Jul 7, 2022

Originator: ISO

Owner: ISO/TC 34/SC 8

Type: International Standard

ICS: 67.140.10

Languages: English

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Status: 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

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

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