Folks,

Has any one replaced stainless steel tubing with PEEK tubing to carry He+ 
sample gas to either a Multiflow or Gasbench? Has anyone noticed any 
reaction with PEEK tubing and different gases?
Right now I have a stretch of PEEK tubing supplying Helium to the flush end 
of a two-holed needle and 1/16th inch stainless steel tubing to carry 
Helium + sample gas (either CO2 or N2O in my case) to a GV 
multiflow/Tracegas. There is no SO2, H2S, H3PO4 involved in this method. 
I'm more comfortable with stainless steel, but maybe PEEK tubing is inert 
to CO2 and N2O?

Thanks
Toti.