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Nine major considerations for liquid nitrogen

By:adminauthor:admin Date:2019-04-27 15:17 View:

Nine major considerations for liquid nitrogen

The liquid nitrogen is extremely cold: boiling to -196 ° C and freezing temperature -210 ° C. Contact with bare skin can cause personal injury, such as burns and dirty injuries such as retinal detachment in the human eye. Liquid nitrogen can also cause common materials such as plastics, carbon steel and rubber to fatigue and eventually break.
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Precautions
 
1. Correct understanding of the use of liquid nitrogen
 
Learn how to store and transport liquid nitrogen. For long-term storage of liquid nitrogen and storage of cell lines and biological specimens, use Dewar or similar pressurized containers. In order to aliquot using a smaller amount in a laboratory procedure, only containers designated for liquid nitrogen can be used. Do not use household vacuum bottles or any old containers that are suspended in the laboratory. Uninsulated containers can adhere to the skin and tear open when removed. Unsuitable containers can also suddenly rupture and spill liquid nitrogen everywhere.
 
2. Wear lab coat, mask and insulated gloves
 
When using liquid nitrogen, protect your skin, especially your face and eyes, from splashing. For added protection, you should also consider wearing goggles under the full face mask. Even if I have a complete mask, because I have witnessed splashing in my eyes. Things can be shot from all angles!
 
3. Work in a well ventilated place
 
If liquid nitrogen is expelled in a closed space, even in your lungs, it will evaporate and displace oxygen, causing suffocation.
 
4. Do not use liquid nitrogen when you are alone in the laboratory for several hours.
 
When using liquid nitrogen, especially when dispensing from large small containers, make sure a colleague is nearby and know what you are doing.
 
5. If possible, do not enter the elevator or confined space when transporting liquid nitrogen.
 
6. Do not sneak into the storage container to retrieve the sample
 
When the liquid is bubbling, no sample is worth suffocating your own vapor or burning your face and/or hands.
 
7. Do not use liquid nitrogen in a closed container
 
Liquid nitrogen rapidly boils, which may cause ice dam formation or pressure build-up, resulting in an explosion. Make sure the storage container is properly drained and do not use liquid nitrogen in a closed system.
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8. Never pour liquid nitrogen into the sink
 
It can cause the pipe to rupture and you will end up with an expensive repair cost. In addition, liquid nitrogen that may fall into a drain may appear, which may be an annoying surprise for colleagues in the next-door laboratory.
 
9. Pay attention to the explosion of the low temperature cylinder
 
  The freezer should be safe liquid nitrogen, right? Not always. Liquid nitrogen will unknowingly enter the cryotube through tiny cracks and then rapidly expand as the tube thaws.


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Email: p​ostmaster@zpxlntank.com
Phone: +8613273728331 
          +8618625920511
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