A lyophilizer of sufficient capacity should be selected. If a large number of small samples are to be lyophilized simultaneously, a high flow rate of water vapor will be present in the system, due to the large size of the evaporation surface, i.e., the combined surfaces of all containers. In this case, the capacity of the vacuum pump should be sufficiently high to maintain a proper vacuum, and the cooling capacity of the cold trap should be sufficient to handle the high flow of water vapor.
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