HI Paul--

H3+ calibration???

take care

gerry

Paul Eby wrote:
> Listmembers,
>
> Has anyone ever seen a calibration slope (known and measured values of 
> two standards) deviate significantly from the expected 0.95 to 1.05? 
> We are consistently seeing 0.67.
>
> This is a new Delta Advantage. d13C and d18O on a pair of OzTech CO2 
> standards by dual inlet both have a slope of approximately 1, so the 
> instrument is otherwise working fine (similar results by GasBench).
>
> Hydrogen is a different story: a pair of OzTech standards by dual 
> inlet has a consistent slope of 0.67, and SMOW/GISP/SLAP by H/Device 
> shows similar results. H3 is consistently around 0.6, and the 
> calibration performed on the H/Device seems stable enough that I could 
> probably ignore the issue and run.
>
> Any suggestions out there on how this could be?
>
> Paul Eby
>
>
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> Alberta Research Council
>
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