Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Study on Rare-Earth Oxides Leaching Rate of Tea Samples Differed by Content Levels

YANG Xiu-fang1,KONG Jun-hao1,ZHAO Yu-xiang1,CHEN Shui-chao2(1.Hangzhou Tea Research Institute,CHINA COOP,Hangzhou,310016,China; 2.Anxi Tieh-Kuan-Yin Research Institute,Anxi,362400,China)  
Typical tea samples representing current levels(under the standard scope,moderate and beyond the standard greatly)of rare earth elements in tea were picked out to carry out experiments of leaching and security studies,and indirect quantitative method was used to calculate the leaching rates and dissolution of rare earth oxides accurately under different infusing conditions including brewing,the security of rare earth oxides in the tea brew was evaluated on dietary risk accordingly.Results of all previous showed that dissolved rare earth oxides(REOs) in test samples digesting in the brew were less than 20% of the total REOs.According to ADI reference value,the above limited leaching rates of REOs were at a low level of exposure,so it could be said that REOs in tea by given an appropriate higher level could not cause safety issue on dietary reliability during tea brewing process.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved