Hg Thermometry

November 24, 2009 at 1:01 am | | hardware, stupid technology

In keeping with green traditions, we’re required to trade out Hg containing thermometers.  For those cases where no equivalent alcohol thermometers exist, they supply Hg thermometers that are encased in Teflon.  One of those thermometers was my baby, a 1/2 degree with a ground glass joint that goes with my favourite distillation head, range 0 to 400C.  Except that Teflon melts at ~325C.  I discovered this fact when the teflon melted off the thermometer and into my rb during a distillation.  FMC (Fail My Chemistry).


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  1. sux

    Comment by sam — November 24, 2009 #

  2. I hesitate to ask, but: what you were fractionally distilling at 325 (in full vac??!!??!!one!!)?

    Kugelrohr all the way…..

    Comment by cookingwithsolvents — November 24, 2009 #

  3. Interesting post! I read about Hg Thermometry back in my high school. I am a college sophomore (2nd year) with a dual major in Chemistry and Psychology @ Duke. By the way, i came across these excellent chemistry flash cards. [redacted] Amazing!!!

    Comment by Peter Kaminsky — November 25, 2009 #

  4. don’t advertise in the comments, it makes me think you’re spam. and duke sucks. ;)

    seriously, though, have a fun time in the piedmont.

    Comment by sam — November 25, 2009 #

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