A method for judging the degree of vacuum freeze-drying in a plug-in type
A vacuum freeze-drying and on-board technology, which is used in drying solid materials, drying solid materials without heating, drying, etc., can solve the problems of difficulty in optimizing the freeze-drying process, and there is no more objective judgment standard. The quality of freeze-dried products, the effect of judgment is good, and the effect of reducing energy consumption
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Embodiment 1
[0027] A method for judging the degree of vacuum freeze-drying in a plug-in type, comprising the following steps:
[0028] Select a container according to the volume of the sample to be dried, the volume of the container is not less than the volume of the sample to be dried;
[0029] Adding water to the container, the volume of the water is not less than the volume of the sample to be dried;
[0030] Add color-changing silica gel particles into the container;
[0031] Water and color-changing silica gel particles in the container are indicative samples;
[0032] Put the indicated sample and the sample to be dried into the ultra-low temperature refrigerator to freeze, and put it into the external tank of the vacuum freeze dryer after freezing;
[0033] Observe the color of the color-changing silica gel particles, and the vacuum freeze-drying ends when the color of the color-changing silica gel particles turns dark blue.
[0034] The water content of the sample to be dried is...
Embodiment 2
[0044] The difference between this embodiment and Implementation 1 is that the weighing is added to further ensure complete drying, and the container is weighed and recorded; the container is weighed and recorded after adding water to obtain the weight of the added water; the container is added with water and discolored After the silica gel particles are weighed and recorded; when the color of the discolored silica gel particles turns dark blue, the indicator sample is weighed, and if the weight loss at this time is not less than the weight of the water added, the vacuum freeze-drying is ended.
[0045] The weight lost after the dried sample is dried is the lost water, so putting the same weight of water in the indicated sample as the weight lost by the dried item can make the drying speed similar. The accuracy of detection can be improved by weighing, and the error caused by judging the color change of the color-changing silica gel particles can be reduced.
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