It is used for serum biochemistry, immunology, drug detection, etc. The separation gel after centrifugation solidifies to form a barrier, completely separates serum and blood cells, obtains high quality serum, maintains serum stability for more than 48 hours, and its biochemical properties and chemical composition do not occur. Significant changes. Can be directly on the machine. The complete blood clot shrinkage time is 20-25 minutes, the centrifugal speed is 3500-4000 rpm, the centrifugation time is 5 minutes, and the recommended storage temperature is 4-25 °C.