Capillary Electrophoresis Inkjet Dispensing

A method for dispensing an analyte from a capillary electrophoresis tube, the method comprising:

• applying a voltage potential through a capillary electrophoresis tube, the capillary electrophoresis tube having a capillary outlet, and a capillary longitudinal axis proximate to the capillary outlet;
• impulsively pumping a sheath liquid through a microfluidic pump chamber having an internal region that is configured to be deformed by an impulsive pump element, wherein the capillary electrophoresis tube extends through the internal region of the microfluidic pump chamber, the microfluidic pump chamber being in fluidic connection with a microfluidic nozzle, the microfluidic nozzle having a nozzle outlet, a tapered internal region proximate to the nozzle outlet, and a nozzle longitudinal axis proximate to the nozzle outlet, wherein the capillary outlet of the capillary electrophoresis tube is located within the tapered internal region of the microfluidic nozzle;
• mixing a separated analyte with the sheath liquid, wherein the separated analyte exits the capillary electrophoresis tube through the capillary outlet, and the mixing of the separated analyte and the sheath liquid is substantially entirely within the tapered internal region of the microfluidic nozzle;
• and
• dispensing the mixture of the separated analyte and the sheath liquid through the nozzle outlet of the microfluidic nozzle.