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Study of electroosmotic flow profile by processing of virtual digital Shah function mask and Fourier transform
Author(s) -
Kitagawa Shinya,
Mitsuya Kotaro,
Chaiyasut Chaiyavat,
Tsuda Takao
Publication year - 2003
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200301496
Subject(s) - capillary action , electro osmosis , flow (mathematics) , chemistry , flow velocity , analytical chemistry (journal) , fourier transform , packed bed , chromatography , materials science , mechanics , electrophoresis , physics , composite material , quantum mechanics
The electroosmotic flow in a packed capillary column (CEC) and in a rectangular capillary (CE) was observed by using a microscope‐CCD‐camera system. The observed image was captured to PC, and virtual digital Shah function mask processing was applied. The flow velocity was calculated by Fourier transform methods. The flow profile was analyzed by multiple measurements of the flow velocity in adjoining regions. The velocity of the electroosmotic flow in a packed capillary column (ID 150 μm, length 18 mm, packed with cation exchanger) was 4.49 μm/s at any point of the column, and the flow profile was flat. The effect of gravity on electroosmotic flow was also studied. The profile of the electroosmotic flow was almost flat under both 1‐G and microgravity, and the electroosmotic flow velocity under microgravity was found to be significantly faster than that under 1‐G.