2016
DOI: 10.1002/jssc.201600660
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Capillary electrophoresis in a fused-silica capillary with surface roughness gradient

Abstract: The electro-osmotic flow, a significant factor in capillary electrophoretic separations, is very sensitive to small changes in structure and surface roughness of the inner surface of fused silica capillary. Besides a number of negative effects, the electro-osmotic flow can also have a positive effect on the separation. An example could be fused silica capillaries with homogenous surface roughness along their entire separation length as produced by etching with supercritical water. Different strains of methicil… Show more

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Cited by 9 publications
(16 citation statements)
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“…However, EOF was higher (curve 5) in comparison to the SCW‐treated capillary with the surface roughness gradient – coarse‐to‐fine orientation (Fig. , curve 2 in ) in the pH range 2–7 although the phosphate buffer concentration was here 2.4‐times higher. The surface roughness has a significant effect on the EOF magnitude, decreases with an increase in roughness height and increases with an increase in roughness length .…”
Section: Resultsmentioning
confidence: 88%
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“…However, EOF was higher (curve 5) in comparison to the SCW‐treated capillary with the surface roughness gradient – coarse‐to‐fine orientation (Fig. , curve 2 in ) in the pH range 2–7 although the phosphate buffer concentration was here 2.4‐times higher. The surface roughness has a significant effect on the EOF magnitude, decreases with an increase in roughness height and increases with an increase in roughness length .…”
Section: Resultsmentioning
confidence: 88%
“…Simultaneously, the induced high‐pressure zone occurs at the front of the rough elements, whereas the low‐pressure zone is in the tail region to satisfy the flow continuity . The higher local changes in pressure zone which make the central flow velocity smaller than that in the near‐wall region does not affect the peak shape in terms of its tailing at BGE pH 7.0. When the matrix components were diffused to the separation buffer, and both analytes were swept into the micelle front, the pre‐concentrated zones of analytes were separated in the MEKC mode and the narrow peaks (albumin, cytochrome c) were detected.…”
Section: Resultsmentioning
confidence: 98%
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