Hi Sean,


Not measured but 'guesstimated' based on observation, the H/D ionisation
efficiency seems to be roughly half of that for CO2 under the 'same'
conditions.

There doesn't seem to be any difference between CF mode using a
combustion/pyrolysis interface for compound specific work or a ConFlow
fed by an EA (or TC/EA); and yes, we had both interface connected to our
Delta_plus_XL.


Hope this helps.


Cheers,

Wolfram



> -----Original Message-----
> From: Stable Isotope Geochemistry
> [mailto:[log in to unmask]] On Behalf Of Sean Sylva
> Sent: 04 February 2004 15:24
> To: [log in to unmask]
> Subject: Ionization efficiency for H2
>
>
> Dear list members.
>
> I am looking for measured values of ionization efficiencies
> (ions/molecules) for continuous flow D/H on a delta plus XL.
> Even if you have an XP I would appreciate your input.
>
> Thank you
>
> Sean Sylva
> _____________________
> Sean P. Sylva
> Mail Stop 4
> Woods Hole Oceanographic Institution
> Woods Hole, MA 02543
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>