Patent
Apparatus for capillary electrophoresis having an auxiliary electroosmotic pump
TLDR
In this article, a conductive membrane connects a second capillary to a second power supply, which act together as an auxiliary EC pump capable of augmenting or inhibiting the bulk electroosmotic flow in the separation capillary.Abstract:
Apparatus for capillary electrophoresis having an auxiliary electroosmotic pump. Following a conventional capillary electrophoresis system having a single power supply, a separation capillary, and an optical detector, a conductive membrane connects a second capillary to a second power supply. The second capillary and second power supply act together as an auxiliary electroosmotic pump capable of augmenting or inhibiting the bulk electroosmotic flow in the separation capillary. The apparatus can be used to optimize the stacking profile of the sample and, thus, improve the separation efficiencies for charged solutes.read more
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References
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Journal ArticleDOI
Zone electrophoresis in open-tubular glass capillaries
Journal ArticleDOI
Electroosmosis: A reliable fluid propulsion system for flow injection analysis
TL;DR: In this article, an electroosmosis-based fluid propulsion system is described, in which the pump is isolated from other components by a grounding joint that is electrically conductive and permits the pumped fluid to be hydrodynamically coupled to contents downstream without leakage.
Journal ArticleDOI
Capillary electrophoresis with electrochemical detection employing an on-column Nafion joint
Thomas J. O'Shea,Robin D. Greenhagen,Susan M. Lunte,Craig E. Lunte,Malcolm R. Smyth,Donna M. Radzik,Nori Watanabe +6 more
TL;DR: In this article, an on-column joint utilizing Nafion tubing for the isolation of the electrical circuit from the detection end of a capillary zone electrophoresis system is described.
PatentDOI
Field-effect electroosmosis
TL;DR: In this paper, the authors present an approach for controlling the rate of electroosmosis due to a first electric potential in an electrically insulating capillary, in which a second electric potential is applied between the electrically-insulating walls of the capillary and a liquid within the liquid.
Journal ArticleDOI
Suppressed conductometric capillary electrophoresis separation systems
Purnendu K. Dasgupta,Li-Yuan Bao +1 more
TL;DR: In this paper, a tubular cation-exchange membrane is installed at the end of a 60 cm-long 75 µm-bore fused-silica capillary, and a static dilute acid regenerant solution surrounds the membranes that functions as a suppressor.