Determination of cadmium and vanadium in tea varieties and their infusions in comparison with 2 infusion processes

Abstract

The mineral contents of the 5 most consumed kinds of tea samples, Black tea, Earl grey tea, Rosehip fruit tea, Sage herbal tea, and Linden herbal tea, were studied for cadmium and vanadium contents in comparison with infusion processes and analyzed by using electrothermal atomization atomic absorption spectrometric method. Cadmium and vanadium levels were determined by using boiled and cold water infusion processes. The mean levels in Black tea, Earl grey tea, Rosehip fruit tea, Sage herbal tea, and Linden herbal tea leaves are 2.79 +/- 0.4, 4.39 +/- 0.6, 8.76 +/- 0.7, 2.62 +/- 0.5, 7.15 +/- 0.8 mug g(-1) for cadmium, and 0.65 +/- 0.1,2.30 +/- 0.3, 2.91 +/- 0.5, 2.59 +/- 0.5, 2.18 +/- 0.3 mug g(-1) for vanadium, respectively. Metal compositions in infusions of tea samples showed significant differences from each other by means of fruit and leaf based teas and infusion processes applied.