Auxiliary electroosmotic pumping in capillary electrophoresis

Following a conventional capillary electrophoresis system with an optical detector, a conductive membrane can be used to connect a second capillary, the terminal end of which is connected to a second power supply, the membrane serving as the common ground for both high-voltage sources. The direction and magnitude of the field applied to the second capillary govern in the bulk flow in the first capillary is augmented, inhibited, or unaffected by the pumping action exerted by the second capillary. The majority of CE applications involve samples of ionic strength lower than that of the running electrolyte and optimum sample stacking is desirable

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