Fluid analytical devices

A fluid analytical device for separating and analyzing a fluid comprising a first component and a second component, wherein the specific weight of the first component exceeds that of the second component, comprising:

• a rotating base comprising a receiving chamber, a first separation well, a second separation well, a first connection channel, a second connection channel, and a vent channel, wherein the receiving chamber receives the fluid, the first connection channel connects the receiving chamber to the first separation well, the second connection channel connects the first separation well to the second separation well, the vent channel is connected to the receiving chamber, the distance from the first separation well to the receiving chamber exceeds that from the second separation well to the receiving chamber,
• whereby, when the rotating base rotates, the first component of the fluid flows into the first separation well via the first connection channel by centrifugal force and friction while the second component flows into the second separation well via the first connection channel, first separation well, and second connection channel by the difference of componential vectors of the centrifugal force and the specific weight of the second component less than that of the first component.