Finnigan MAT TC-EA pyrolysis unit. Samples are placed in silver capsules and dropped into a 1325°C oven in a He flow. The oven is packed with glassy carbon (petri dish at right -- click on object for a close-up). During heating, reduction occurs forming H₂ and CO.

The H₂ and CO are separated in a GC and analyzed for their dD and d¹⁸O values in a single run. Water, organic matter (bird feathers) and hydrous minerals have all been run successfully.

After a number of analyses, the graphite capsules are filled with liquid silver and need to be replaced to reduce peak tailing (enlargement).

Check out the impressive Finnigan screen display.

Here's Jeff Kelly loading a bird feather. And Marcia Jensen enjoying her data collection. Viorel Atudorei is less enthusiastic.