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Electrokinetic flow through packed capillary columns

✍ Scribed by Qi-Lie Luo; Joseph D. Andrade

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
162 KB
Volume
11
Category
Article
ISSN
1040-7685

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✦ Synopsis

This paper is a theoretical study of electroosmotic flow through various model packings to understand the mechanisms of capillary electrochromatography Ε½ . CEC and to take full advantage of CEC. Two different equations for electroosmotic flow velocity are described and compared with each other through two-and three-dimensional figures. The optimal channel diameter in the common ionic strength range is determined. The importance of ionic strength and packing microstructure is further verified. The properties of various packing beds are compared and an ''ideal'' packing, with parallel flow channels and minimum tortuosity, is suggested. The reasons that CEC has not achieved the predicted separation efficiency are pointed out. This study sheds light on approaches to achieve the high separation efficiency and selectivity available by CEC.

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