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,并比较水蒸气蒸馏提取(SD)与超临界CO2萃取(SFE)所得土木香挥发的差异。

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.

子交换剂在萃取色谱得到广泛的应用，本文详细总子交换剂在析化学用于碱金属、碱土金属、贵金属、稀土元素、锕系元素等的与测定。