Comparison and Risk Assessment for Trace Heavy Metals in Raw Pu-erh Tea with Different Storage Years

Biological Trace Element Research
Fen LiBin Yang

Abstract

This research conducted an exploration of the content of microelements (As, Cr, Cd, Pb, Cu, Zn, Mn, and Hg) in raw Pu-erh tea with different storage years. The contents of As, Cr, Cd, Pb, Cu, Zn, Mn, and Hg were 0.14, 0.82, 0.02, 0.52, 14.59, 33.51, 564.02, and 0.01 μg/g, respectively, and were all less than the national standard limit values in China. The target hazard quotients (THQs) of each heavy metal were all lower than 1, and the value of combined risk hazard index (HI) of all to adults was 0.221, which presents no health risk when consumed properly by adults of the raw Pu-erh tea infusions. Interestingly, there was no significant correlation between the heavy metal element (As, Cr, Cd, Pb, Cu, Zn, Mn, and Hg) contents and the THQ values of raw Pu-erh tea samples and storage years; the correlation coefficients (R2) range from 0.01 to 0.33 and from 0.01 to 0.57, respectively. The result showed that the storage years showed no effect on the exposure risk of heavy metals; the heavy metal elements in tea samples come from the atmosphere and soil.

References

Aug 15, 2000·American Journal of Industrial Medicine·P J LandriganP Apostoli
Oct 31, 2002·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Taiyi JinGunnar F Nordberg
Jun 9, 2006·Journal of Toxicology and Environmental Health. Part a·Chung-Yih KuoHuei Lee
Mar 1, 2008·Bulletin of Environmental Contamination and Toxicology·Fwu-Ming Shen, Hong-Wen Chen
Mar 11, 2008·Journal of Hazardous Materials·Sait C Sofuoglu, Pinar Kavcar
Dec 6, 2008·Environmental Monitoring and Assessment·Zahra AtafarAmir Hossein Mahvi
Apr 24, 2010·The Science of the Total Environment·Hongbin CaoJianjiang Chen
Jul 20, 2010·Phytotherapy Research : PTR·Zhen-Hui CaoChang-Rong Ge
Sep 27, 2013·PloS One·Young Ae ChoMoonsu Kang
Feb 8, 2014·PloS One·Hongguang ChengChunye Lin
Apr 2, 2014·Environment International·Masaaki NakamuraMineshi Sakamoto
Jun 11, 2014·Food Additives & Contaminants. Part B, Surveillance·Qing-long FuVarenyam Achal
Oct 30, 2015·Environmental Science and Pollution Research International·Hsiu-Ling ChenYi-Ting Kao
Jan 19, 2016·Forensic Science International : Synergy·Daniel DiasHelena M Teixeira
May 9, 2016·Environmental Monitoring and Assessment·Marian Asantewah NkansahAbiathar Abraham Ackumey
Jan 19, 2018·International Journal of Environmental Research and Public Health·Jian ZhangLei Gao
Feb 21, 2018·Environmental Health : a Global Access Science Source·Wen-Yi Yang, Jan A Staessen

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