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).

研究土木挥发油的化学成分,并比较水蒸气蒸馏提取(SD)界CO2萃取(SFE)所得土木挥发性成分的差。

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.

交换剂在萃取色谱中得到了广泛的应用，本文详细总结了交换剂在分析化学中用于碱金属、碱土金属、贵金属、稀土元素、锕系元素等的分测定。