Patent ID: 7740748

Claim:
An electrophoresis system, comprising: an electrophoresis device comprising: a microfluidic chip having a cover and a substrate, said substrate carrying three channels of approximately equal depth, said channels being: a loading channel in fluid communication with and extending between a first and second sample port and having a width between four and ten times that of the other two channels, an injection channel initiating at the loading channel to form a first intersection and in fluid communication with and terminating in a third reservoir, a separation channel connected to the injection channel to form a second intersection and in fluid communication with and extending between a first and second reservoir; electrodes coupled to the first sample port and the third reservoir, and the first reservoir and the second reservoir, respectively, that are adapted to move the sample into the loading channel towards the third reservoir and form a sample plug in the second intersection, and to further move the sample plug into the separation channel towards the second reservoir; and means for applying a pressure differential between said first and said second sample port.