How does a centrifuge work?

The gravity on objects is caused by the attraction of the earth. The direction of gravity is always downward, so the surface of the earth is a gravity field. Objects fall from high places to low places due to the action of gravity. It is the phenomenon of gravity settlement. According to the laws of mechanics, the speed at which solute particles in objects and mixtures sink is proportional to their own mass. When the solute particles in the mixture are very small and stationary, it is impossible to observe their sedimentation speed only by the action of gravity. It is necessary to artificially imitate the action of the gravity field and add it to the particles to speed up the sedimentation speed. Appropriate time to achieve the purpose of settlement. This artificial force is the centrifugal force on the rotating object. As long as we control the centrifugal speed and the distance between the particles and the central axis during movement, we can control the centrifugal force on the particles, so that the particles can settle according to our requirements. . The equipment that implements this process (principle of centrifugation) is the centrifuge.

The relationship between centrifugal force, rotational speed and rotor radius: RCF (centrifugal force) = 0.0000112 X R (rotor radius) X N (2nd power) square of the rotational speed.

RCF unit: g

R unit: cm

N unit: revolution/minute (rpm)

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