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- Vo:外水体积/空流体积,填料分子外的体积,根据几何学原理,体积大约占柱体积的1/3,精确测量使用2000KD的葡聚糖 - Vi:内孔体积/内水体积,填料分子内的体积, - Vt:总液体体积 - Vs:固相凝胶体积,大约占柱体积的5% - Vc:柱体积,根据柱高和直径计算得到,又称柱床体积 - Ve:保留体积/洗脱体积,又叫VR - 体积压缩比: