1) multiple extraction
多次萃取
2) multiple headspace extraction
多次顶空萃取
1.
Progress in multiple headspace extraction techniques
多次顶空萃取技术研究进展
3) the extraction times
萃取次数
1.
based on the distribution law, the paper discusses the relationship between the extraction times and the extraction efficiency; the choices of the optimum extraction times when the distributive coefficient is different.
本文以分配定律为依据,对间歇多次萃取中次数和效率的关系及不同分配系数时最佳萃取次数的选择等问题做一探讨。
4) multistage extraction
多级萃取
1.
The vapour-liquid equilibrium composition on the various plates and the theoretical plate number of the plate tower, reaction volume of multistage continuous stir reactor and the theoretical stage number of multistage extraction can be calculated by this method.
介绍了Excel中填充柄的特点,并对其在板式精馏塔各块塔板上的汽-液平衡组成与理论板数、串联全混流反应器的反应体积和多级萃取的理论级数应用中给出了详细的操作步骤和计算实例。
6) multi-solvent partition
多溶剂萃取
1.
Methods of enrichment of azadirachtin by solvent and multi-solvent partition were studied,The optimized condition of multi-solvent partition of azadirachtin obtained by orthogonal tests was: solvent: dichloromethane: ethyl acetate(1 ∶5,V ∶V),separatory liquid: acetone:water(1 ∶1),solvent:separatory liquid(10 ∶3).
对比研究了多溶剂萃取法与单溶剂萃取法精制印楝素的效果,并通过正交试验法选择了多溶剂萃取法精制印楝素的最佳试验条件为:萃取溶剂V(二氯甲烷)∶V(乙酸乙酯)1∶5,分相液V(丙酮)∶V(水)1∶1,V(萃取溶剂)∶V(分相液)10∶3,该方法可将乙醇提取物中印楝素的质量分数从3。
补充资料：不等重复次数测定
分子式：
CAS号：
性质： 在各实验条件下进行不相同重复次数的测定。这种测定的实验安排比较复杂，但较灵活。
CAS号：
性质： 在各实验条件下进行不相同重复次数的测定。这种测定的实验安排比较复杂，但较灵活。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条