Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide

Huisheng Lü; Shuangyan Liu; Yonghui Li; Fanmei Meng; Dawei Yao; Xufei Mo

doi:10.1016/j.cjche.2016.04.020

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Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide

Separation Science and Engineering | Updated：2026-01-06

- Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide
- Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide
- 中国化学工程学报（英文版） 2016年24卷第12期页码：1680-1686
- Affiliations：
  
  Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University R & D Center for Petrochemical Technology,Tianjin,China,300072
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.04.020
  中图分类号：
- 纸质出版：2016
- Accepted：
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Huisheng Lü, Shuangyan Liu, Yonghui Li, 等. Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide[J]. 中国化学工程学报（英文版）, 2016,24(12):1680-1686.

Huisheng Lü, Shuangyan Liu, Yonghui Li, Fanmei Meng, Dawei Yao, Xufei Mo. Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide[J]. , 2016, 24(12): 1680-1686.
Huisheng Lü, Shuangyan Liu, Yonghui Li, 等. Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide[J]. 中国化学工程学报（英文版）, 2016,24(12):1680-1686. DOI： 10.1016/j.cjche.2016.04.020.

Huisheng Lü, Shuangyan Liu, Yonghui Li, Fanmei Meng, Dawei Yao, Xufei Mo. Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide[J]. , 2016, 24(12): 1680-1686. DOI： 10.1016/j.cjche.2016.04.020.

摘要

Abstract

Adsorption equilibrium is of great importance for the preparative supercritical fluid chromatography (pre-SFC) in defining supercritical adsorption behavior and the industrial amplification. This paper presents adsorption isotherms of Z-ligustilide from supercritical carbon dioxide (SC-CO

) on C18-bonded silica. Adsorption behavior was studied at 305.15 K

313.15 K and 323.15 K with SC-CO

density varying from 0.687 g·cm

-3

to 0.863 g·cm

-3

with the elution by characteristic points (ECP) method. The adsorption amount of Z-ligustilide from SC-CO

on C18-bonded silica decreased with the increasing density of the mobile phase as well as the increasing temperature. Adsorption equilibrium data were fitted by Langmuir and Freundlich isotherm models

and the Langmuir isotherm model performed better for describing the whole adsorption process on the column. The monolayer saturation adsorption capacity of Z-ligustilide is in the range of 3.0×10

-4

mg·cm

-3

to 5.5×10

-4

mg·cm

-3

with an average value of 4.0×10

-4

mg·cm

-3

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