Method for judging internal state of freeze dried substance, internal state judging device and freeze drying apparatus

摘要

To determine whether to complete drying of the inside of an object having been subjected to freeze-drying, in a non-destructive manner.SOLUTION: A internal dry state determination method for a freeze-drying object is a method for determining an internal dry state of an object having been subjected to freeze-drying, and comprises: an arrangement step of arranging the object having been subjected to freeze-drying, in a resonance electromagnetic field of microwaves generated with a microwave resonator; a detection step of detecting at least one of resonance frequency and resonance peak voltage in the resonance electromagnetic field after the object is arranged; and a determination step of comparing the detection value obtained in the detection step with a preset threshold to determine the internal dry state of the object.SELECTED DRAWING: Figure 4