ISO 19563:2017Published

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

Détermination de la théanine dans le thé et le thé instantané sous forme solide en utilisant la chromatographie en phase liquide à haute performance

A new edition is under development: ISO/AWI 19563.

Abstract / 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

Replaced by

ISO/AWI 19563Under developmentDetermination of theanine in tea and instant tea in solid form using high-performance liquid chromatographyInternational Standard · ISO/TC 34/SC 8 ISO/PWI 19563Deleted (project abandoned)Determination of theanine in tea and instant tea in solid form using high-performance liquid chromatographyInternational Standard · ISO/TC 34/SC 8