Can't liquid nitrogen be kept sealed

Users who often use liquid nitrogen know that liquid nitrogen cannot be sealed and stored, because it will cause an explosion in an enclosed space, and what we use to store samples with liquid nitrogen is to use the gaseous nitrogen vaporized by liquid nitrogen to absorb heat, so as to reach minus 196 degrees The temperature, save the samples, cells.

In the process of use, we should try our best to reduce the opening time of the tank mouth and reduce the chance of liquid nitrogen contacting with the air, thereby reducing the volatilization of liquid nitrogen.

Do not seal the liquid nitrogen in order to reduce the volatilization of liquid nitrogen, it is likely to outweigh the gains.

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