Hey gang,
We've been doing a lot of VT experiments at 60/80 oC lately. My student
decided to calibrate the probe's thermocouple with the glycerol/DMSO-d6
(80/20) chemical shift thermometer, and for that he used stuff out of
bottles (i.e., not dry glycerol or dry DMSO-d6). We did a couple of
runs (60 and 80 oC), and noticed that our temperatures are off by quite
a bit ('60' is actually 65, and '80' is actually 90, pretty linear).
Since this was quite a change, I was wondering if having 'wet' solvents
will affect the measurement. If so, anyone knows of an easy way of
drying these things which won't involve distillation from Na or CaH? I
know I can just buy the stuff from CIL and be done with it, but I want
to save 65 bucks, and it would be nice if my student could do this...
Guillermo
+==================-------------- --- -- - - - -
Guillermo Moyna, PhD
Assistant Professor of Chemistry
Department of Chemistry & Biochemistry
University of the Sciences in Philadelphia
600 South 43rd Street
Philadelphia, PA 19104-4495
"The only existing things are atoms and empty space.
All else is mere opinion" - Democritus, 370 B.C.
Office: Griffith Hall 360
Phone: (215) 596-8526
Fax: (215) 596-8543
e-mail: g.moyna_at_usip.edu
WWW:
http://tonga.usip.edu/gmoyna/index.html
http://www.usip.edu/chemistry/faculty/moyna.asp
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Received on Mon Mar 29 2004 - 08:06:36 MST