Abstract
Inorganic substances in green tea infusion were analyzed by using atomic absorption spectrophotometer.
On analyses of calcium, magnesium, manganese, zinc, sodium, potassium, nickel, cobalt, iron, copper, cadmium and strontium, the elements detected were calcium, magnesium, manganese, zinc, sodium and potassium. Copper was found in the ash of green tea, but not in the tea infusion.
Nickel, cobalt, iron, cadmium and strontium were detected neither in infusion nor in ash. The amounts of the detected elements were increased by raising the infusion temperature. Even at 40°C, considerable quantities of the elements were found.
Quantitative analyses of the elements were carried on each sample from the first to thefifth infusions, and it was found that the concentration of the elements were the highest in the first and the second infusion.
