Help with He sparging of HPLC solvents
Philip J. Wyatt
phil at wyatt.com
Fri Feb 16 21:33:15 EST 1996
In article <4fogus$ddr at newsbf02.news.aol.com> jafinlay at aol.com (Jafinlay)
> I use helium sparging in our HPLC solvents to degas. I have yet to find
> good text explaining exactly how this works. Does anyone out there know
> of good documentation on He sparging of solvents? If not does anyone
> of any more chemistry/chromatography related newsgroups?
> Judith Finlay
Why don't you use an in-line degasser and conserve the irreplaceable He we
have remaining here on earth. I believe that a recent NSF report
suggested greater conservation should be pursued since He will become even
more important for research purposes in the years ahead.
Enough of the soapbox lectures. I believe that the He atoms are supposed
to knock loose the dissolved gasses. Once this occurs, the atmosphere
above the mobile phase becomes a pure He buffer to prevent further access
to the mobile phase by gasses that are soluable. He is not soluable, of
But try a Waters in-line degasser, for example, or others that are readily
available. We think they're great! And then there is no danger in this
earthquake country of a He tank falling over!
Phil Wyatt -- phil at wyatt.com
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