Here's an old idea: Patience. Try to keep the inlet (needle valve) closed
until you get the water out of the mass spec itself. Keep helium flow
through the peripherals and Conflo IV as you normally would. Watch the mz
18 level over time to see that it is actually going down. Once the water
level in the mass spec itself is down to the normal level, open up the
valve to the peripherals. You may have to wait as the water in those is
worked out as well. There are tricks to speed it up, but patience is the
main thing you'll need. If you have any water traps (in an EA for
example), check them to see if they need changed. Expect to have to change
the source out sooner than usual.
> Hi all,
> Did anyone have already encourted a high level of water (measured at m/:z
> 18) on Delta V with Isolink configuration.(Conflow IV)? I suspect a
> failure in helium flow 2 weeks ago during WE. Since this date the level of
> 18 is already above 20 Volts !!. By heating the needle valve in fronts of
> MS the level raise up to 50 Volts; The replacement of the two holes
> ferrule at the needle valve entrance did not change anything. It seems
> that water is permanently brought to the ms line. By connecting conflow IV
> the level f 18 decreases slighltly.
> Thanks for new idea !!
> Michel Désage
> Ingénieur de Recherche
> Université Claude Bernard LYON I / CRNH Rhône-Alpes.
> Centre Hospitalier Lyon Sud / CBAPS
> Bâtiment 3D - 165 chemin du grand Revoyet
> 69495-Pierre Bénite
> Tel: 33 (0) 4 78 86 29 82 (Direct) /29 46 (labo) /29 81 (Secrétariat)
> Fax: 33 (0) 4 78 86 44 62
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