Paper-based micro-concentrator, biological sample detection device and biological sample detection method

A paper-based micro-concentrator, comprising:

• a bearing substrate;
• a fluid reservoir unit comprising a first buffer solution tank and a second buffer solution tank, wherein the first buffer solution tank and the second buffer solution tank are interval disposed on the bearing substrate, and the first buffer solution tank and the second buffer solution tank store a buffer solution respectively;
• a filter paper disposed on the bearing substrate, wherein two ends of the filter paper are respectively placed in the first buffer solution tank and the second buffer solution tank;
• an external electric field comprising a cathode and an anode, wherein the cathode and the anode are respectively placed in the first buffer solution tank and the second buffer solution tank;
• an ion exchange membrane disposed on the filter paper and close to the first buffer solution tank;
• and
• a magnet movably disposed under the bearing substrate;
• wherein the ion exchange membrane is a cation exchange membrane or an anion exchange membrane;
• wherein when the ion exchange membrane is the cation exchange membrane, a surface of the filter paper has a negatively charged functional group, the cathode is placed in the first buffer solution tank, and the anode is placed in the second buffer solution tank;
• wherein when the ion exchange membrane is the anion exchange membrane, a surface of the filter paper has a positively charged functional group, the anode is placed in the first buffer solution tank, and the cathode is placed in the second buffer solution tank.