Abstract
The present invention is a microfluidic chip capable of transporting multiple samples and is applicable to proportion and inject multiple sample fluids, where the microfluidic chip comprises a base and a hollow microfluidic channel unit formed inside the base. A voltage is applied in the microfluidic channel unit to cause electroosmosis so as to drive different fluids to flow and, by adjusting the voltage, sheath flow can be generated inside the microfluidic channel unit to restrict the width of each sample fluid. Then, by capturing a part of each outputted sample fluid of restricted width, volume proportioning effect can be accomplished.