The requirements for the liquid nitrogen storage environment mainly include the following aspects:
1. Temperature requirements: The storage temperature of the liquid nitrogen tank is one of the most important requirements. Generally speaking, the liquid nitrogen tank needs to be stored in an ultra-low temperature environment of -196℃ to ensure the long-term preservation and stability of the material. Since the liquid nitrogen tank needs to be stored for a long time, its temperature stability is directly related to the preservation effect of the experimental material.
2. Ambient temperature: The liquid nitrogen tank should be placed in a cool room or shaded place, away from direct sunlight and high temperature environment to reduce the impact of heat on the tank body.
3. Humidity requirements: The storage environment of the liquid nitrogen tank also requires a dry environment with a relative humidity of 30-50%. Too high humidity will cause dew on the tank wall, and too low humidity will accelerate the drying of the sample, thereby making the experimental material inactive.
4. Ventilation requirements: In the storage environment of the liquid nitrogen tank, ventilation is also one of the essential elements. Ventilation can maintain good airflow in the room, prevent the accumulation of carbon dioxide and other harmful gases, and thus avoid damage to the experimental materials.
5. Vertical placement: The inner and outer tanks of the liquid nitrogen tank are only connected by the neck tube, which is relatively fragile. To avoid the neck tube from breaking due to stress problems, we should store it vertically.
6. Other requirements: When storing liquid nitrogen tanks, other requirements need to be paid attention to. For example, the liquid nitrogen tank should be placed in a protective net to avoid liquid nitrogen spillage and personal injury.
In summary, the requirements for the liquid nitrogen storage environment include temperature, ambient temperature, humidity, ventilation, vertical placement, and other safety measures. Only by ensuring that the storage environment of the liquid nitrogen tank meets the standards can the preservation and stability of the experimental materials be guaranteed.
