| abstract |
A liquid-feeding chip for feeding a liquid utilizing the action of centrifugal force and gravity by rotating the chip around an axis of rotation, includes a first storage tank ( 1 - 1 ) into which the liquid can be introduced when rotation of the chip is stopped, and two or more liquid-feeding units arranged in a plurality of levels adjacent to each other, each liquid-feeding unit (U- 1, U- 2, U- 3 ) being composed of a first holding tank ( 10 - 1, 20 - 1, 30 - 1 ), a second holding tank ( 10 - 2, 20 - 2, 30 - 2 ) positioned in the direction of gravity with respect to the first holding tank, and a channel B (B- 1, B- 2, B- 3 ) which extends from the first holding tank in the direction of gravity and which connects the first holding tank and the second holding tank, the first holding tank at a first level being connected with a channel A (A- 1 ) which extends from the first storage tank toward an outer circumferential side. In the liquid-feeding chip, the adjacent liquid-feeding units are connected by a channel C (C- 1, C- 2 ) which extends from the second holding tank of the liquid-feeding unit at an upper level to an outer circumferential side during rotation, and which is in communication with the first holding tank of the liquid-feeding unit at a lower level. |