A Different Analysis of REEs Total Content and REE in Different Type Tea
One method based on microwave digestion and ICP-MS is used to determine 16 REEs in different type tea,and materials included Oolong tea,Rock tea,Green tea,Black tea and Dark tea.The results indicate that the value of REEs total content met the national limited standard (≤2 mg/kg) in all samples from Green tea,and more than 85 samples are qualified in Black tea and Dark tea,and about half samples are only qualified in Oolong tea and Rock tea.Simultaneously,the proportion of LREE is 2 times more than that of HREE at least,La and Ce for nearly half of proportion,Ce for more than a quarter.Therefore,fully understanding REE total content in different type tea and its internal relations of REE provid scientific theoretical basis for tea quality safety monitoring and REE evaluation standard.
NETL
NSTL
万方数据
维普
