野生中药田基黄中稀土元素含量分析

中药材中的有效成分研究得到了人们的普遍关注。应用ICP-MS分析了中药材田基黄中稀土元素的含量。结果表明田基黄稀土元素La，Ce，Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Yb，Tm，Lu和Y的浓度在6～14 522 ng·g-1的范围之间。在上述稀土元素中，田基黄稀土元素含量超过2 000 ng·g-1的有La(4871.64), Ce(14 522.03)和Nd(2 064.94)。与粮食作物比，田基黄中稀土元素的含量是稻米、小麦、玉米和大麦等粮食的上千倍，这可能是田基黄具有肝病治疗效果的重要因素。稀土元素在田基黄中的分配除了自身的吸收分配特性以外，还要受土壤等环境因素的影响，分配机理还需要进一步研究。

Content of Rare Earth Elements in Wild Hypericum Japonicum Thunb

Rare earth elements are important nutritional elements for human health, and today more and more attention has been paid to the effective components in Chinese traditional medicine, especially to rare earth elements. Fifteen rare earth elements in wild hypericum japonicum Thunb were analyzed by the methods of ICP-MS. The results showed that the concentrations of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Tm, Lu and Y ranged from 6 ng·g-1·DW to 14 522 ng·g-1·DW, and among them the concentrations of La, Ce and Nd were higher than 2 000 ng·g-1·DW. Compared with the concentration of rare earth elements in rice, corn, wheat and barley, the total concentration of rare earth elements in hypericum japonicum Thunb was much higher, which could be the mechanism of curative effect of hypericum japonicum Thunb on liverish diseases. The character of elements and the content of rare earth elements in soil should be responsible for the difference, but the distributive mechanism of rare earth elements in hypericum japonicum Thunb should be further studied.