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On-chip Isotachophoresis for Separation of Ions and Purification of Nucleic Acids

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Ice chromatography: current progress and future developments.

Tetsuo Okada¹, Yuiko Tasaki

¹Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8551, Japan. tokada@chem.titech.ac.jp

Analytical and Bioanalytical Chemistry

|August 28, 2009

Summary

Ice chromatography uses ice particles for separation and studying the ice surface. This technique reveals molecular interactions and measures the liquid layer on ice.

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Area of Science:

Analytical Chemistry
Physical Chemistry
Materials Science

Background:

Ice chromatography utilizes water-ice particles as a stationary phase.
Fine ice particle preparation enhances separation resolution and surface analysis.
This method probes the complex solution/ice interface.

Purpose of the Study:

To detail the application of ice chromatography for high-resolution separations.
To investigate molecular interactions at the solute/ice interface.
To evaluate surface melting phenomena and liquid phase characteristics of ice.

Main Methods:

Ice chromatography with fine ice particles.
Hexane-based mobile phase for separations.
Analysis of solute retention and ice surface interactions.

Main Results:

Successful separation of estrogens, amino acids, and acyclic polyethers.
Evidence of multiple hydrogen bonds between solutes and ice surface dangling bonds.
Quantification of the surface liquid layer thickness and internal liquid phase size.

Conclusions:

Ice chromatography is effective for separating diverse compounds.
The method provides detailed insights into ice surface molecular processes.
It accurately characterizes the thermodynamic equilibrium of water ice and its coexisting liquid phase.