Chromium level and intake from Chinese made tea.
Tea is a popular drink around the world. It is also one of the sources of metal intake. The objectives of this study were to assess chromium (Cr) intake from popular green, oolong, black and Pu-erh tea. In total, 128 Chinese made teas were analysed and concentration differences among four types of tea were explored. Black tea contained highest total Cr, which varied between 0.63 and 17.60 mg/kg. The lowest content was found in the green tea samples, between 0.26 and 1.30 mg/kg. Cr(III) and Cr(VI) in black tea were higher than in other types of tea. Cr(III), Cr(VI) and total Cr concentration in different tea infusions were also analysed. The results suggest that drinking tea is an effective way for Cr intake and the risk of adults and children being chronically intoxicated by tea infusions is low.
a School of Life Science and Technology , Tongji University , Shanghai , China.
Wei-Hao
WH
Li
Hai-Ping
HP
Zhou
Ning
N
Li
Sai-di
SD
Wang
Xiao-Juan
XJ
Liu
Zeng-Jun
ZJ
Jin
Yan-Zhen
YZ
Bu
Zhi-Xue
ZX
Liu
D000328:Adult; D002648:Child; D002681:China; D002857:Chromium / Q000737:chemistry*; D005504:Food Analysis; D005506:Food Contamination; D006801:Humans; D013662:Tea / Q000737:chemistry*
D013662:Tea; D002857:Chromium
chromium; intake; safety; tea; tea infusion