go to jove.com

HIGH SCHOOL

Environmental Sciences

Science Experiments

Environmental Sciences

This is a free preview. For full access

Earth Science

Separating Lipid Classes by Column Chromatography

Description

Column chromatography is used to separate lipid classes in a total lipid extract. A total lipid extract, or TLE, is often a complex mixture made up of hundreds or even thousands of compounds. Researchers may only need a few target compounds, so they remove the compounds they are not studying.

Tho...

Transcript

柱层析是一种灵活的技术,用于纯化沉积物中发现的复杂化合物混合物。混合物在穿过色谱柱时分离并收集成馏分,每种馏分都包含不同化学类别的化合物。因此,柱层析通常用作初始分离所需化合物后的额外纯化步骤。有机提取物(如总脂质提取物)可能是许多化合物的复杂混合物。一些纯化技术(如皂化)会引入会损坏分析仪器的化合物,因此必须在分析前去除。本视频是从沉积物中提取、纯化和分析脂质的系列视频的一部分。从沉积样品中收集到总脂质提取物后,根据所需的分析,使用柱色谱法纯化烯酮和 GDGT。

在柱色谱法中,将化合物混合物加载到固体固定相(如硅胶)上。然后使用流动相(如有机溶剂)洗脱或去除色谱柱中的化合物。化合物的洗脱顺序取决于化合物与硅胶和洗脱液相互作用的强度。

洗脱液以分份形式收集,分份...

Tags

Column ChromatographyTotal Lipid ExtractSilica GelOrganic SolventFraction CollectionAlkenones PurificationGDGTs PurificationSaponification RemovalStationary PhaseMobile Phase

More videos by Standards