petroleum benzin

petroleum benzin 基本解释

网络  石油醚; 石油精

化学医学

重点词汇

• benzin[化] 汽油; 挥发油 [医] 石油精, 苯精, 汽油
• petroleumn. 石油 [化] 石油

petroleum benzin 双语例句

1. 1、 The alcohol extract would be extracted with petroleum benzin, chloroform, acetic ether and n-butanol in turn after being mixed with water. Recover the solvent together with the water layer extract. Thus, we gained five samples of different polarity.
   醇浸膏水混悬后，依次以石油醚、氯仿、乙酸乙酯、正丁醇萃取，连同萃取后的水层（及混悬物）分别回收溶剂，得到相应不同极性的五部分样品。
2. 2、 The component research take use of the traditional method, which devided the Dragon` s blood with petroleum benzin, chloroform, Eac and methanol on silica gel. This paper is dedicated to the Eac part of Dragon` s blood.
   研究内容及方法1、龙血竭成分研究采用传统的分离手段，即硅胶柱层析获得龙血竭的石油醚，氯仿，乙酸乙酯和甲醇部分，本课题重点研究乙酸乙酯部分。