We recently switched from black rubber vacuum hose, which I had used for
over 10 years, to Nalgene 50 Silicone Tubing (8060-0130) for L-N2
transfer. It is slightly on the expensive side, but seems to work very
well for us. A magnet service tech told me he had used this type of
tubing for years, and never had single incident (cracking) on it. The
other time saving factor : by gently wiping the "frozen" tubing with a
towel after the L-N2 transfer is done, it will go soft and ready to be
disconnected from the magnet within a minute or two.
Dee
--
Dee-Hua Huang, Ph.D.
Director, Chemistry NMR Facility
The Scripps Research Institute
10550 N. Torrey Pines Rd.
La Jolla, CA 92037
(858)-784-2329
(858)-784-2391 (FAX)
dee_at_scripps.edu
Received on Fri Jun 20 2003 - 14:26:22 MST