Serum:
  It is a yellowish transparent liquid that is coagulated and precipitated by blood. If the blood is drawn out and put into the blood collection tube, without anticoagulant, the coagulation reaction is activated, the blood is rapidly coagulated, jelly is formed, the clot shrinks, and the light yellow transparent liquid precipitated around it is serum.

  Preparation of serum:  
       1. Put the blood into a blood collection tube without anticoagulant
  2. Stand and coagulate until the blood is clotted
  3. Centrifuge after equilibration (generally 3000rpm, centrifugation for 5~10min)
  4. The supernatant is serum, which can be carefully aspirated out (be careful not to suck out the cell components) and put into the serum tube for later use. (Serum tube as shown below)

  Principles of Serum Sample Transportation:
      1. Serum should be stored at -5 °C to -2 °C, if stored at 4 °C, do not exceed one week. Do not leave the serum at 37°C for too long.
  2. Tie the corresponding number of ice packs around the serum tube (depending on the number of samples) and put them in the foam test box and send them.
  3. Minimize the storage time, deal with it in time, and submit it for inspection as soon as possible.