Sample pretreatment device and sample pretreatment method for nucleic acid sequencing

A sample pretreatment method for nucleic acid sequencing, using a sample pretreatment device for nucleic acid sequencing which comprises:

• a carrier, provided with a pretreatment chamber, a fluid inlet and a fluid outlet, wherein the fluid inlet and the fluid outlet communicate with the pretreatment chamber;
• a first electrode disposed on a top wall of the pretreatment chamber;
• a second electrode disposed on a bottom wall of the pretreatment chamber;
• and a controller to which the first electrode and the second electrode are electrically connected;
• and
• the method comprising:
• introducing a sample into the pretreatment chamber through the fluid inlet before performing nucleic acid sequencing on the sample;
• and
• applying, by the controller, an alternating current to the first electrode and the second electrode to separate a first nucleic acid fragment and a second nucleic acid fragment to make the second nucleic acid fragment move towards an upper layer of a fluid and the first nucleic acid fragment move towards a lower layer of the fluid.