Designs and Analytical Exploitation of Novel Separation Fields

• Okada Tetsuo

  Department of Chemistry, Tokyo Institute of Technology

• Tasaki Yuiko

  Department of Chemistry, Tokyo Institute of Technology

Bibliographic Information

Other Title

• 新しい分離場の設計と分析化学的展開
• アタラシイ ブンリバ ノ セッケイ ト ブンセキ カガクテキ テンカイ

Abstract

This paper reviews the designs of novel physical and chemical separation fields principally based on the authors' work. Usual physical fields simultaneously recognize materials and sizes of particles and may therefore result in unnecessarily complex separation in some cases. A physical field incapable of resolving a particular particle property, such as size, must be useful from this point of view. We have devised a coupled acoustic-gravity field, in which particles are aggregated at a particular position determined only by their acoustic properties. This field has been successfully applied to probe the interior structures of silica gel particles, separation of particles based on materials, the acoustic recognition of counterions in cation-exchange resins etc. Water-ice is related to various phenomena occurring in the global environment, and therefore the molecular processes taking place at its surface are of broad interest. If water-ice is used as a chromatographic stationary phase, we can effectively probe the molecular interactions at the interface between water-ice and a mobile phase. From this perspective, we have developed ice chromatography and have successfully verified various phenomena involved in retention processes. At temperatures lower than −3°C, solute retention can be explained by the hydrogen bonding of a solute with the -OH dangling bonds on the water-ice surface. However, the surface of water-ice becomes liquid-like as the temperature is raised ; this surface melting has been detected by a drastic change in the dominant retention mechanism from adsorption to partition. Ice chromatographic separation of various compounds, which is realized by the development of an efficient method for fine ice particle preparation, is also presented, involving estrogen, amino acid derivatives, ingredients in green tea leaves etc.

Journal

• BUNSEKI KAGAKU

  BUNSEKI KAGAKU 57 (12), 921-935, 2008

  The Japan Society for Analytical Chemistry

Keywords

• ultrasound
• particle separation
• acoustic recognition of counterions
• water-ice
• quasi liquid layer
• ice chromatography

Details

• CRID: 1390001204356008576
• NII Article ID: 110007008601
• NII Book ID: AN00222633
• DOI: 10.2116/bunsekikagaku.57.921
• COI: 1:CAS:528:DC%2BD1MXhtFWjsw%3D%3D
• NDL BIB ID: 9746254
• ISSN: 05251931
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9746254
• Web Site: http://www.jstage.jst.go.jp/article/bunsekikagaku/57/12/57_12_921/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10897125
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • NDL-Digital
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed