Silica gel column chromatography and solvent extraction were used to separate grease and abradant in a kind of excellent polishing paste for plastics, respectively.
分别采用硅胶柱色谱法和溶剂抽提，分离优质塑料抛光膏中的油脂和磨料部分。
Methods Three compounds were isolated by a combination of RP-18and silica gel column chromatographies, and their structures were identified by spectral methods.
方法采用硅胶和反相硅胶RP- 18柱色谱分离，运用有机波谱分析确定化合物结构。
A relatively considerable amount of dissociation and purification of the mucor racemosus crude extract are conducted using silica-gel column.
用硅胶柱对总状毛霉粗提液进行较大量分离提纯研究。
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