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Previous by Date: Subject: Re: [DCHAS-L] Chemistry Demos for Community Date: Friday, August 31, 2018 at 7:12:02 AM Author: Jarral Ryter <jryter**At_Symbol_Here**WESTERN.EDU> |
Next by Date: Subject: [DCHAS-L] Chemical Safety headlines (11 articles) Date: Fri, 31 Aug 2018 07:46:23 -0400 Author: DCHAS Membership Chair |
> >Would safety guidelines for liquid nitrogen use in a restaurant differ from the standards set for lab use? If so, what differences would be taken into consideration?
Yes, liquid nitrogen quality must be considered. I investigated this when a chemistry demonstration using liquid N2 to make ice cream was proposed for one of our dorms. Vendors can supply "food grade" liquid nitrogen which is produced in a way that avoids contamination from oils and other impurities in the machinery that produces the N2. This grade of liquid nitrogen is more expensive than lab N2 and the price difference led our chemists to move on to other "cool" demonstrations of chemistry in real life.
Something else I didn't know until the question arose, which is why I love this job ;).
- Ralph
Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
603 358-2859
ralph.stuart**At_Symbol_Here**keene.edu
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