Cryogenic storage is used for the storage of blood and cell products for research purposes. Final storage is in multi-compartment cryo-bags and the bag is encased in overwrap for an extra layer of protection against cross contamination. A technique called controlled-rate freezing is used to prepare the cells for long-term storage. The bag is then housed in a protective cassette and placed in a freezer in the vapour phase of cryogenic nitrogen. Leading scientists believe cord blood stem cells can be cryogenically stored indefinitely.
Is it better to store my samples in liquid or vapour phase nitrogen?