Dear Isotopers,

We're turning on our high temperature GC pyrolysis furnace for the first time. I can't seem to find clear/straightforward instructions in either manual that I have access to at the moment. [Is the Pope Catholic?]

Can someone recommend the timing and rate and temperatures for this reactor furnace?

Also, one manual mentions preconditioning, meaning injecting a microliter of solvent in the column before actually analyzing samples. Does anyone know what this actually does? And, do any of you have a procedure in place for this?

Thanks for your help. We're proceeding and will keep you informed regardless.

Marilyn Fogel

Dr. Marilyn L. Fogel

Geophysical Laboratory

Carnegie Institution of Washington

5251 Broad Branch Rd., NW

Washington, DC 20015

Phone (202) 478-8981

Main office (202) 478-8900

FAX (202) 478-8901