Patent ID: 7727478

Claim:
A micro total analysis system comprising: an inspection chip including at least: a pump connection having a plurality of flow path openings for communicating with a micro-pump; a plurality of flow paths which have different flow path resistances and communicate with the plurality of flow path openings and in which fluid flows; and a fluid mixing section on which two or more fluids coming from the plurality of flow paths are joined and mixed, the system further comprising: a system body including at least: 1) a base body; 2) a micro-pump unit which is positioned on the base body and includes: a chip connection having a plurality of flow path openings for communicating with the inspection chip and a plurality of micro-pumps of substantially same shape which are driven by substantially same voltage and communicate with the plurality of flow path openings of the chip connection; wherein the micro-pump unit permits fluid to flow in the inspection chip by a liquid-tight connection between the pump connection and the chip connection, 3) an optical detection system for optical detection of optical properties of the mixed fluid on the inspection chip to generate data related to the optical properties, 4) a detection processor for collecting the data from said optical detection system and for performing measurement and processing of the data; and 5) a controller for controlling at least functions of the micro-pump unit and the detection processor, wherein the controller is configured to drive each of the plurality of micro-pumps to permit fluid to flow from the plurality of flow paths to the fluid mixing section while the pump connection and the chip connection are connected liquid-tightly, and then the micro total analysis system achieves a mixing ratio m to n, which is a flow rate ratio of the two fluids joining at the fluid mixing section and is not 1 to 1 and which is determined by the flow path resistances.