Progress in multiple headspace extraction techniques
多次顶空萃取技术研究进展
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。
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。
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。
Study on Thermodynamics in Multi-Extraction System of Lincomycin;
多元萃取体系提取林可霉素的热力学研究
Study on the Process of Separation of Lincomycin from Fermentation Broth by Multi-Extraction System;
多元萃取体系分离发酵液中林可霉素的过程研究
Extraction and separation of isoflavones by SFE-CO_2
SFE-CO_2技术萃取分离异黄酮苷元的研究
Determination of impurities in high purity aluminium by inductively coupled plasma mass spectrometry after matrix separation
萃取分离-ICP-MS测定高纯铝中痕量元素
The distribution ratios of actinides are very low when aqueous phase is nitric acid.
在硝酸溶液中 ,萃取体系对锕系元素的萃取率很低 ;
Study on Improved Utilization of Hop Polyphenols with Supercritical CO_2 Extraction
超临界萃取啤酒花浸膏及其萃余物中多酚化合物提取的研究
An Experimental Study on the Extraction Process of Phenol-Hydroxylation Products and Analogy Calculation of Multilevel Cross-flow Extraction;
苯酚羟化液萃取脱水的实验研究及多级错流萃取的模拟计算
Preparation of Solid Glass Microspheres and the Study on Sorptive Extraction of PAHs in Aqueous Sample;
玻璃萃取微球（SGMs）的研制及其对水中多环芳烃（PAHs）的萃取研究
Solvent extraction of multiple nonferrous metals in the South Africa
非洲南部多种有色金属的溶剂萃取(一)
Extracting Laminaran Polysaccharides by PEG/(NH_4)_2SO_4 Aqueous two-phase system;
PEG/(NH_4)_2SO_4两水相萃取海带多糖的研究
Study on Relationship Between the Amount and Effect in Extracting Tea Polyphenol by Ethyl Acetate
乙酸乙酯萃取茶多酚的量效关系研究
Study on Extraction Performances of Multi-component in Wet Process Phosphoric Acid-Tributyl Phosphate System
WPA-TBP体系中多组份萃取行为的研究
Effect of Ultrasound-microwave Treatment on Extracting Rate of Ganoderma lucidum Polysaccharides
超声波-微波协同萃取对灵芝多糖提取率的影响
Study on the Supercritical Fluid Extraction of Tea Polyphenols for Tea and Its Application
超临界萃取茶叶中茶多酚的提取与应用
THE COMPUTER AID CALCULATION FOR LIQUID-LIQUID EXTRACTION OF TERNARY SYSTEMS
三元物系液-液萃取过程的计算机辅助计算
Research on Dynamic of Extraction Diosgenin by Supercritical Fluid;
超临界流体萃取薯蓣皂甙元的动力学研究
Study of Separation for the Binary Systems of Cyclohexanol and Cyclohexanone by Extraction Rectification;
环己醇与环己酮二元体系萃取精馏分离研究
The Research on the Extractive Distillation with Salt in Triple Azeotrope System;
三元共沸体系加盐萃取精馏的工艺研究
