PL
Badano wpływ masy odważki, czasu naparzania oraz dodatku soku cytrynowego i kwasu cytrynowego na zawartość Zn, Cd, Mn, Cu, Ni i Pb w naparach herbacianych. Ponadto określono stężenie w/w pierwiastków w suszu herbacianym i ich procent ługowania do naparu.
EN
The content of Zn, Cd, Mn, Cu, Ni and Pb in tea levels and tea beverages was investigated. It was shown that 1 g tea leaves ought to be taken to determine the selected metals content by AAS. Greater samples may lead to understimation of these elements. It was found that the time of infusion and amount of leaves taken to prepare infusion affected the leaching yield of the metals to tea beverages. Addition of lemon juice and citric acid increased the level of all studied elements exept copper. Tea beverage is a limited source of zinc and copper, and a rich one of manganese (about 1%, 2% and 50% of recommended daily intake, respectively) and it supplies a small amount of Cd and Pb PTWI (about 0.3%).