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

ISO-19563 - 1ST EDITION - CURRENT


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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.

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67.140.10 (Tea Including herb teas)

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Document Number

ISO 19563:2017

Revision Level

1ST EDITION

Status

Current

Publication Date

Jan. 1, 2017

Committee Number

ISO/TC 34/SC 8