[Determination of theanine in tea leaves by HPLC-inhibited chemiluminescence with Co2+ catalyst].

A method for the separation and determination of theanine in tea leaves has been developed, based on inhibited chemiluminescence of cobalt-catalyzed luminol-H2O2 reaction by theanine. Separations were performed on a YWG-C18 column using a mobile phase of 0.01 mol.