Mixing disk assembly for use on centrifugal platform

A mixing disk assembly for use on a centrifugal platform, comprising:

• an inner separation disk with a first ring part and a second ring part disposed on the outer periphery of the first ring part, with the first ring part having multiple pawls;
• the first ring part of the inner separation disk is provided with at least two eluent reservoirs, at least two recycling chambers, and at least one mixing chamber, wherein the at least two eluent reservoirs are in fluid communication with the at least two recycling chambers and the at least one mixing chamber through at least two metering units, and the at least one mixing chamber is in fluid communication with a siphoning channel and a separation column;
• and
• an outer collection disk rotatably mounted on the second ring part of the inner separation disk, the outer collection disk having multiple tapered recesses that when the multiple pawls of the first ring part engage some of the multiple tapered recesses, the outer collection disk rotates synchronously with the inner separation disk, wherein each fraction collector comprises a feeding channel and multiple collecting chambers;
• and the outer collection disk has multiple fraction collectors in fluid communication with the separation column through a collection tube;
• and
• when a rotational speed difference between the inner separation disk and the outer collection disk occurs, causing the outer collection disk to rotate relative to the inner separation disk and allowing the pawl to exit one tapered recess and switch to another tapered recess.