Direct Analysis of Minerals in Tea Infusion by Inductively Coupled Plasma-Atomic Emission Spectrometry

Abstract

Elemental concentrations in tea infusion were compared between two samples, one of which was prepared by the standard preparation that is the infusion was concentrated, dried and lied to ash, and the other was not pretreated. Analysis was carried out by using an inductively coupled plasmaatomic emission spectrometry. The concentrations of Ca, Mg, Al, Mn, Zn, B, P and K determined in tea infusion showed no significant differences between the both preparations. It is possible to assay directly elemental concentration in tea infusion without any pretreatment. By using the direct analysis method, the solubilities of minerals of tea into the infusion were determined on Sen-cha and Kamairi-cha.