Discrimination of black tea grades by means of cyclic voltammetry using polyacrylamide/exfoliated graphite composite electrode

In this paper, six different grades of Assam CTC black tea liquor were discriminated by means of cyclic voltammetry. A 3-electrode configuration was used to study the voltammogram where Polyacrylamide/Exfoliated Graphite composite (PAM/EGC) was used as the working electrode. Data obtained from the tea samples were subjected to multivariate data analysis techniques viz. Radar plot, Box plot and Principal Component Analysis (PCA). The results were found quite promising, thus justifying the suitability of the prepared working electrode for the quality estimation of tea.