Pourramezani Fatemeh, Akrami Mohajeri Fateme, Salmani Mohammad Hossein, Dehghani Tafti Arefe, Khalili Sadrabad Elham
Zoonotic Diseases Research Center Department of Food Hygiene and Safety School of Public Health Shahid Sadoughi University of Medical Sciences Yazd Iran.
Department of Environmental Health Engineering School of Public Health Shahid Sadoughi University of Medical Sciences Yazd Iran.
Food Sci Nutr. 2019 Nov 17;7(12):4021-4026. doi: 10.1002/fsn3.1267. eCollection 2019 Dec.
Tea grows in the contaminated soils, absorbs the heavy metals, and enters them into the human food chain. The concentrations of Pb, Cd, Cu, As, and Hg of the imported black tea leaves to Hormozgan Province were evaluated by atomic absorption spectrometer. Then, the Hazard Quotient (HQ) and Hazard Index (HI) levels of heavy metal intakes were calculated to estimate the health hazard for consumers. The Pb, Cd, Cu, As, and Hg concentrations in the Sri Lankan and Indian blank tea were 0.14, 0.017, 11.29, 0.057, 0.0076 mg/kg, and 0.21, 0.02, 14.56, 0.067, 0.01 mg/kg, respectively. It was found that except for As concentration in Indian black tea were higher than Sri Lankan black tea. The HQ and HI levels of all studied metals were less than one, but they were higher in Indian black tea compared with the Sri Lankan black tea. The HI of Indian and Sri Lankan black tea samples were 0.061 and 0.048, respectively, which indicated no significant health hazard for tea consumers. The results showed that the consumption of the studied tea could not have any risk of heavy metal exposure.
茶叶生长在受污染的土壤中，吸收重金属，并进入人类食物链。通过原子吸收光谱仪对霍尔木兹甘省进口红茶茶叶中的铅、镉、铜、砷和汞浓度进行了评估。然后，计算重金属摄入量的危害商（HQ）和危害指数（HI）水平，以估计对消费者的健康危害。斯里兰卡和印度红茶中铅、镉、铜、砷和汞的浓度分别为0.14、0.017、11.29、0.057、0.0076毫克/千克和0.21、0.02、14.56、0.067、0.01毫克/千克。结果发现，除印度红茶中的砷浓度高于斯里兰卡红茶外。所有研究金属的HQ和HI水平均小于1，但印度红茶中的HQ和HI水平高于斯里兰卡红茶。印度和斯里兰卡红茶样品的HI分别为0.061和0.048，这表明对饮茶者没有显著的健康危害。结果表明，饮用所研究的茶叶不会有任何重金属暴露风险。
