Author/Authors :
Shekoohiyan، Sakine نويسنده Department of Environmental Research, Center for Social Determinants in Health Promotion, Hormozgan University of Medical Sciences, Bandar-Abbas, Iran , , Ghoochani، Mahboobeh نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Mohagheghian، Azita نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Mahvi، Amir Hossein نويسنده Department of Environmental Health Engineering, School of Health; National Institute of Health Research; Center for Solid Waste Research, Institute fo , , Yunesian، Masoud نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Nazmara، Shahrokh نويسنده 1Center for Environmental Research and Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ,
Abstract :
Tea is one of the most common drinks in all over the world. Rapid urbanization and industrialization in recent
decades has increased heavy metals in tea and other foods. In this research, heavy metal contents such as lead
(Pb), cadmium (Cd) and arsenic (As) were determined in 105 black tea samples cultivated in Guilan and Mazandaran
Provinces in north of Iran and their tea infusions. The amount of heavy metals in black tea infusions were analyzed
using Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP - AES).
The mean ± SD level of Pb in 5, 15 and 60 min in infusion tea samples were 0.802 ± 0.633, 0.993 ± 0.667 and 1.367 ±
1.06 mg/kg of tea dry weight, respectively. The mean level of Cd in 5, 15 and 60 min in infusion tea samples were
0.135 ± 0.274, 0.244 ± 0.46 and 0.343 ± 0.473 mg/kg of tea dry weight, respectively. The mean level of As in 5, 15 and 60
min in infusion tea samples were 0.277 ± 0.272, 0.426 ± 0.402 and 0.563 ± 0.454 mg/kg of tea dry weight, respectively.
Also, the results showed that the locations and the infusion times influenced upon the amount of these metals
(P < 0.05).
