Dear
isogeochems,
I work
on a GC-C-IRMS delta + (MAT 252). For one 2 weeks, I have had a problem. The
amplitude of the CO2 reference peaks decreased during the week (from 2.5V to 1V
in mass 45). So I should adjust the potentials many times in the week. Now it
happens 3 times in the day.
The
CO2 bottle and the pression are OK. Does any one know the reason of this kind of
probleme. Should I only wash the ion source ?
Many
Thanks
Laure-Amélie
Gonthier
Eurofins
Scientific