Nitrogen makes up about 78% of the Earth's atmosphere. Liquid nitrogen is very cold, so it is often used to freeze food. The boiling point of nitrogen is −196 °C, so liquid nitrogen is very ...

There are many types of vacuum traps and filters. Examples include the vacuum cold trap, liquid nitrogen cold trap, vacuum inlet trap (VIT), molecular sieve trap, cryogenic trap, and dry ice trap. A ...

Cold traps maintain a chilled stainless steel or glass surface or well for vapors to condense or sublimate on; glass is preferable when chemical resistance is a concern. These devices utilize an ...