parent fraction meaning in English

母体部分

By using ec membrane material as column packing , double - distilled water as mobile phase , the retention times ( tr " ) are measured with suitable inorganic and organic compound as solutes . 3 . complying with the retention times , the partition coefficient of the solute ( ka " ) and the ratio of the surface excess concentration of solute ( ) with the concentration of the parent fraction ( cab ) are calculated
利用物理改性的方法研制了乙基纤维素( ethylcellulose ，简称ec )膜材料，并将其作为高效液相色谱柱的固体填料，以高效液相色谱模拟反渗透实验平衡条件，以水为流动相，选择合适的无机物和有机物作为溶质，测定乙基纤维素对它们的相对保留时间及平衡分配常数k _ a 。