Abstract
A micro-chip for detecting pH value, including: a horizontal substrate; a fluid channel forming plate that is laminated on the top of the substrate in cooperation with the substrate to define a hollow fluid channel through which a specimen may flow; an electrode unit placed on the top of the substrate, for detecting the pH value of the specimen located in the fluid channel; and an air chamber forming plate horizontally laminated on the top of the fluid channel forming plate. The fluid channel forming plate includes at least two elastic pump portions that are located above the fluid and spaced from each other. The air chamber forming plate and the fluid channel forming plate are mutually matched to define two air chambers that respectively contain the pump portions and are capable of intermittently pumping air to cause the pump portions to elastically sink toward the fluid channel for compressing and pushing the specimen to flow in the fluid channel.