Nucleic acid extraction appratus and operation method thereof

An apparatus for nucleic acid extraction comprising:

• a first rack having a plurality of sample tube receivers arranged in a circle;
• a second rack located under the first rack and having a plurality of elution tube receivers arranged in a circle and corresponding to the plurality of sample tube receivers, wherein the second rack has a washing solution receiver therein to receive a fluid, wherein the washing solution receiver is extended outwards radially from the center of the second rack to have a plurality of projections formed in alternation with the plurality of elution tube receivers;
• a rotational driver rotating the first rack and the second rack, synchronously or separately;
• a dispenser dispensing a washing solution and an eluting solution into the plurality of sample tubes, respectively;
• and
• a pressurizer pressurizing the plurality of sample tubes,
• wherein the rotational driver has a configuration to rotate the first rack and the second rack to locate the plurality of sample tubes in the first rack to be lined up with the washing solution receiver or a plurality of elution tubes in the second rack, and
• a washing operation or an eluting operation is carried out when the first and second racks are driven to have a synchronous rotation.