Objective:to study the chemical constituents of the essential oil of Inula helenium L.were extracted by steam distillation(SD)and supercritical-CO2 fluid(SFE).

研究土木香挥发油的化学成分,并比较水蒸气蒸馏(SD)超临界CO2萃(SFE)所得土木香挥发性成分的差异。

This review summaries the application of ion exchangers in the separation and determination of alkali metals, alkali-earth metals, noble metals, rare earth elements and actinoid.

离子交换剂在萃色谱得到了广泛的应用，本文详细总结了离子交换剂在分析化学用于、土、贵、稀土元素、锕系元素等的分离测定。