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Citation: Zhao Guoliang, Liu Zhiguang, Zhang Shuzhong. STUDY ON THE ADSORPTION EFFECT IN IONEXCLUSION DISTRIBUTION CHROMATOGRAPHIC SEPARATION OF FATTY ACIDS[J]. Chinese Journal of Applied Chemistry, ;1989, 6(2): 95-99. shu

STUDY ON THE ADSORPTION EFFECT IN IONEXCLUSION DISTRIBUTION CHROMATOGRAPHIC SEPARATION OF FATTY ACIDS

1.
Department of Chemistry, Dalian University of Technology

Received Date: 25 April 1988
Available Online: 16 August 1988

The adsorption effects in ion-exclusion chromatographic separation of formic, acetic,propionic, iso-butyric, butyric, iso-valeric and valeric acids have been studied. It is assumed that both Donnan membrane equilibrium and adsorption equilibrium are involved in chromatographic process. Thus, the following equation expressing the distribution coef-ficient, K_d, can be derived when water is used as an eluent: K_d=((K+1){[1+4(2+K)C/K_a]^1/2-1})/(2K+3+[1+4(2+K)C/K_a]^1/2) where K, K. and C are adsorption equilibrium constant, dissociation constant and acid concentration at peak maximum respectively.The adsorption equilibrium constants of some fatty acids are estimated from the retention data. Linear relationship between lnK and topological parameters, ¹x are observed.
- Ion-exclusion chromatography,
- Aliphatic acids,
- Adsorption
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