Leukopak collection is a technique for centrifuging human blood in the presence of Anticoagulant Sodium citrate during cardiopulmonary bypass by a single collector, and obtaining mononuclear cells by using their different densities.
                
            
| Whole Blood | Blood Components | |
| Collected blood volume | <400ML | Cumulative cycle<7.5~10L | 
| Acquisition interval | 3 months ~ half a year | Once every 2-3 months, less than or equal to 6 times a year | 
| infectivity | Whole blood is a sensitive source of infection | Full automatic operation, disposable consumables, no manual intervention | 
| One time collection quantity | 400~600million | 6000~7500million | 
| purity | Direct Ficoll is difficult to remove clean red blood cells | The content of red blood cells in component blood is already very low. Again, Ficoll basically contains no red blood cells |