At 03:41 PM 6/20/03 -0400, camass wrote:
>dear group,
>given the cost of an nmr i seem to be missing the point of using latex
>vs a braided stainless hose. i have used latex but find it a pain. if
>necessary (not desirable) you can remove the stainless hose while cold
>and it presents no dangers i know of.
I can write to that point. When I was a postdoc at UAB, learning to be an
NMR manager at the knee of one of the best, Dee Huang, we had a stainless
steel hose.
I often helped with fills and one day discovered that our stainless steel
transfer tube was not ours and had been reclaimed by its owner. I
jury-rigged a transfer line of 3/8" copper tubing and was astonished at how
much faster the fills went. I concluded then and still believe that the
mass of the stainless steel apparatus resulted in much waste to keep it cold.
I could be wrong, but my recollection is that fill times were cut by 2/3.
Bill
William C. Stevens, Ph.D. NMR Facility
Director Southern Illinois University
Carbondale, IL 62901-4405
618-453-6498 fax -6408 U.S.A.
http://opie.nmr.siu.edu/bill.html
Received on Mon Jun 23 2003 - 13:29:14 MST