Dear all,

In adittion to Tullis question, can anyone suggest methods to improve
sensitivity (reduced sample amount demands) on my GCCIRMS compared to
the "standard performance"? I have a Delta plus connected to a GCC.

I have also observed stepwise decrease in the reference gas pulse
intensity (perhaps not surprisingly since I let oxygen pass into the MS
for a very short time once and then at a second occasion the open split
capillary broke and air was sucked into the IRMS. At both occasions
there was a safety shut down.)

Need to clean the source and change filament or what?


               Lars Löfgren

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