Patent ID: 7976779
Filing Date: 2011-07-12
Classification: G01N

Abstract:
1. A microfluidic system for liquid chromatography comprising: (A) a main chip comprising a front surface and a back surface, the main chip further comprising: a substrate having a front face and a back face; a chromatography column on the front face of said substrate, wherein said column has an inlet and an outlet; at least one pump system on the front face of said substrate comprising a pump chamber, at least one electrode, and an outlet microfluidically coupled to the inlet of said column, wherein said electrode is part of a set of interdigitated electrodes and at least a portion of said electrode is internal to the pump chamber; (B) a reservoir chip comprising a front surface and a back surface, wherein the reservoir chip has at least one cavity in the back surface which when disposed next to the front surface of the main chip extends the volume of the pump chamber.