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题名: Integral optimizing functional of separation efficiency
作者: Liang, H;  Lin, BC
关键词: separation efficiency ;  integral optimizing functional ;  mixed entropy change
刊名: JOURNAL OF CHROMATOGRAPHY A
发表日期: 1999-05-14
卷: 841, 期:2, 页:133-146
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine ;  Physical Sciences
类目[WOS]: Biochemical Research Methods ;  Chemistry, Analytical
研究领域[WOS]: Biochemistry & Molecular Biology ;  Chemistry
英文摘要: According to thermodynamics, the integral optimizing functional of separation efficiency (Delta S-s), which is the mixed entropy change between initial and final states directly associated with separation efficiency, was presented to indicate integral separation efficiency for any zone separation method by further considering the entropy change from the uniform to the arbitrary distribution of solute zones. Physically, as a system properly, Delta S-S is equal to the amount of information that the solute system obtains from its separation surrounding, or separation system. It can be quantitatively related to the irreversibility of separation processes in the entropy balance equation, and corresponds to the extent of Boltzmann order. In separation science, Delta S-S corresponds to the quantity of separated solutes. For any arbitrary distribution of solute zones, Delta S-S can be calculated directly from the distributions and relative positions of solute zones and the number of moles of solutes. Thus Delta S-S can be calculated directly from the separation results of chromatography and electrophoresis to indicate separation efficiency integrally and quantitatively. For example, for Gaussian distributions of zones, Delta S-S can be calculated directly from the standard deviations of the peaks (sigma), the distance between the centers of gravity of adjoining zones (hr) and the number of moles of the solutes (n) or the peak height (h). A quasi-inverse relation between Delta S-S and separation pureness of solutes (phi) was found numerically. In any effective separation process, Delta S-S is always a negative value, and the more negative Delta S-S is, the better the separation efficiency is. The computer simulation supported the above characters of Delta S-S. The discovery of Delta S-S is a part of the nonequilibrium thermodynamic separation theory, which can be used to integrally optimize and One-varying control the complete separation systems - the aggregates of solute systems and separation systems. (C) 1999 Elsevier Science B.V. All rights reserved.
关键词[WOS]: ELECTROPHORESIS
语种: 英语
WOS记录号: WOS:000080439400001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138556
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Xian Jiao Tong Univ, Coll Chem Engn, Dept Appl Chem, Xian 710049, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116012, Peoples R China

Recommended Citation:
Liang, H,Lin, BC. Integral optimizing functional of separation efficiency[J]. JOURNAL OF CHROMATOGRAPHY A,1999,841(2):133-146.
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