Ning Pengbo, Gong Chunmei, Zhang Yanming, Guo Kangkang, Bai Juan
a College of Veterinary Medicine, Northwest A & F University , Yangling , Shaanxi 712100 , China.
Food Addit Contam Part B Surveill. 2011;4(1):28-33. doi: 10.1080/19393210.2011.551945. Epub 2011 Feb 24.
The Yunnan region of China produces a distinctive variety of Pu'er tea, which is consequently labeled as a Chinese geographic indication product. In this study, the safety of Chinese Yunnan Pu'er tea with regard to heavy metal content was evaluated in 30 different brands of Pu'er tea, including 150 commercial samples. Metal levels in the Pu'er tea samples followed the order: copper (12-22 µg/g) > lead (0.26-3.2 µg/g) > arsenic (0.035-0.24 µg/g) > cadmium (0.0059-0.085 µg/g) > mercury (<0.010 µg/g). Mercury was not detected in 17 of the brands of Pu'er tea. Metal-to-metal correlation studies showed that there were no significant correlation between metal pairs. Based on current safety standards, the low levels of metals detected in these Pu'er tea samples mean they are safe for human consumption.
中国云南地区产出一种独特的普洱茶品种，因此被列为中国地理标志产品。在本研究中，对30个不同品牌的普洱茶（包括150个商业样品）中云南普洱茶的重金属含量安全性进行了评估。普洱茶样品中的金属含量顺序为：铜（12 - 22微克/克）>铅（0.26 - 3.2微克/克）>砷（0.035 - 0.24微克/克）>镉（0.0059 - 0.085微克/克）>汞（<0.010微克/克）。17个普洱茶品牌中未检测到汞。金属之间的相关性研究表明，金属对之间没有显著相关性。基于当前的安全标准，这些普洱茶样品中检测到的低金属含量意味着它们对人类消费是安全的。
