While we are on the question of ANCA software I wonder if individual
analyses are corrected for isobaric interferences.

Normally the d18O stays the same during a run but when the furnace or
reduction furnace is on its last legs the d18O can change in a run.  Based
on the change in the d13C at the same time I suspect that no correction is
made.


Does anyone know anything about this?



Hi Harry,
> We have had problems with the Anca software similar to this many times and
> that exact problem just recently. Last time, even opening the "Calctest"
> file output by the reprocessor program di not help us and we are simply
> using a separate installation of the software that is working properly on
> another computer to reprocess.
> In a number of cases, this sort of fault is fixed by deleting and
> re-writing
> the setup (*.SET file).
> Here's the checklist that I would go through: have the integration
> settings
> (*.apd file) in the setup been changed? Try the running setup file with no
> APD. Are the ref gas and sample peak integration windows correctly
> declared
> as such in setup? (a common fault with me). It seems as if the set file
> gets
> corrupted from time to time and it also seems as if changes made are not
> saved, therefore my trick of chucking it out altogether
>
> The sample list must have the same setup for every sample. The samples
> must
> be declared correctly in the sample list as sample+reference delta
> (calculated vs ref gas pulse) or as separate sample and reference (delta
> vs
> solid standards)
>
> None of this is guaranteed to work
>
> From my experience with the previous Anca, I got very quick at
> reinstalling
> the whole software, with working backups of the .SET, .REF .SRC etc files
>
> Good luck
>
> Robert
>