Hi Ken
Not sure whether the systems are Bruker or Agilent. We use house air at about
-50 dewpoint, but for our 500 I purchased a -80 SP FTS XR cooler, and SP
sold me a -80C dewpoint dryer to go with it. I don’t stress the dryer
(it is quite low flow capacity) and have separated the dry air for VT flow
alone.
Our Bruker 600 NEO upgrade came with an inline nitrogen purifier –
recommended above 500 for all Brukers. Alex above provides a pretty good
description of what Bruker needs for the BCU.
Our LCMS lab is apparently getting a fancier nitrogen purifier with its own
storage. That is all I know. The item comes from Bruker, so you might
check with them about higher-flow nitrogen purification.
Also – I was recently spammed by a company called “Rutherford
and Titan” that provides compact liquid nitrogen generators. Fortunately,
I answered. I expect that for about 100 K you could get a compact unit to make
your liquid nitrogen and draw off high pressure boil-off when you needed it.
I’ll send you the email thread if you are interested.
Dave
David M. Rice Ph.D.
Director ORED NMR Facility
376 Science and Engineering 2
University of California, Merced
5200 N. Lake Road, Merced CA 95343
Office: 1-209-228-4606
NMR Lab 1-209-228-2508
Mobile: 1-650-267-0593
Email: drice2_at_ucmerced.edu<mailto:drice2_at_ucmerced.edu>
> From: main_at_ammrl.groups.io on behalf of Kenneth Sharp-Knott via groups.io
> Date: Tuesday, June 3, 2025 at 11:28 AM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: [AMMRL] N2 or Dry air options for VT gas
Hi Everyone,
In the past we have not done much VT work in a temperature range which would
require N2 gas. With some recent upgrades has come increased VT capabilities
and I need to find a good way to provide either N2 gas or dry air to some
instruments.
We do not have house N2. I have, in the past used N2 boil off from LN2 tanks,
but I'm reticent to use this as the primary gas to our consoles.
Do you have any suggestions on a setup where it could air primarily and
switched to N2 gas when needed for extreme low or high temps during VT?
When is dry air suitable vs N2 gas?
Thanks for your time!
Ken Sharp-Knott
Manager of Analytical Services and the NMR Facility
Department of Chemistry
Virginia Tech
(540)267-6502 (Cell)
(540)231-0885 (Office)
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Received on Tue Jun 03 2025 - 17:45:58 MST