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北京石油化工学院2026年研究生招生接收调剂公告
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stormxuhao

至尊木虫 (知名作家)

[求助] 液相色谱中,分离因子与相对保留值有什么区别?

仅仅从计算方法上来讲
两者是一样地
都可以化为两种物质的保留时间的比值
但是从原理上或者定义上来看
两者有没有什么区别
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guevara1967

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2楼2012-05-01 10:30:31
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stormxuhao

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引用回帖:
2楼: Originally posted by guevara1967 at 2012-05-01 10:30:31:
http://www.chemalink.net/books/C/33/0.html

您的意思是说这两者根本就是一个东西?
那为什么还要定义两个值?
3楼2012-05-01 10:33:27
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guevara1967

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【答案】应助回帖

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stormxuhao: 金币+10, ★★★★★最佳答案 2012-05-01 11:00:21
relative retention
http://goldbook.iupac.org/R05277.html
separation factor
http://goldbook.iupac.org/S05614.html

仔细比较一下,似乎有些区别
梦想、激情、灵感、体验--che
4楼2012-05-01 10:51:26
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guevara1967

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separation factor,  
in column chromatography
The relative retention value calculated for two adjacent peaks (http://goldbook.iupac.org/MathML/S05614-1.png):
http://goldbook.iupac.org/MathML/S05614-2.png
By definition, the value of the separation factor is always greater than unity. The separation factor is also identical to the ratio of the corresponding distribution constants. The separation factor is sometimes also called the 'selectivity'. The use of this expression is discouraged

relative retention,  
in column chromatography
The ratio of the adjusted or net retention volume (time) or retention factor of a component relative to that of a standard, obtained under identical conditions:
http://goldbook.iupac.org/MathML/R05277-1.png
Depending on the relative position of the peak corresponding to the standard compound in the chromatogram, the value of  may be smaller, larger or identical to unity.
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5楼2012-05-01 10:54:42
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guevara1967

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soundhorizo: ACI+1, 辛苦 2012-05-01 11:23:07
separation factor,  
in column chromatography
The relative retention value calculated for two adjacent peaks ():

By definition, the value of the separation factor is always greater than unity. The separation factor is also identical to the ratio of the corresponding distribution constants. The separation factor is sometimes also called the 'selectivity'. The use of this expression is discouraged

relative retention,  
in column chromatography
The ratio of the adjusted or net retention volume (time) or retention factor of a component relative to that of a standard, obtained under identical conditions:

Depending on the relative position of the peak corresponding to the standard compound in the chromatogram, the value of  may be smaller, larger or identical to unity.
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6楼2012-05-01 10:57:00
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