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The first is to store at 4 ℃. After removing the antiserum, the liquid state is stored in a common refrigerator, which can be stored for 3 months to half a year. When the potency is high, it will not affect the use within one year. Add 0.1% ～ 0.2% NaN3 to preserve during storage. If half the amount of glycerin is added, the shelf life can be extended. The second method is low-temperature storage, which is stored at -20 to -40. Generally, the titer will not decrease significantly after 5 years of storage, but it should be prevented from repeated freezing and thawing. Therefore, small packages should be used for low-temperature storage so that they can be used up in a short time after being taken out. The third method is freeze-drying. The final product moisture should not be higher than 0.2%. It can be stored for a long time after packaging. Generally, the potency will not be significantly reduced in the refrigerator within 5 to 10 years. How to thaw frozen serum: After removing the serum from the freezer, put it in a 2-8C refrigerator to dissolve it, then dissolve it at room temperature. But it must be noted that during the dissolution process, it must be shaken regularly and evenly.
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