Heidelberg 2015 – wissenschaftliches Programm
UP 13.26: Poster
Donnerstag, 26. März 2015, 10:45–19:45, G/Foyer
Dating with Atom Trap Trace Analysis of 39Ar: Methods of sample preparation — •Arne Kersting1, Thomas Reichel1, Sven Ebser2, Florian Ritterbusch1,2, Werner Aeschbach-Hertig1, and Markus K. Oberthaler2 — 1Institute of Environmental Physics, Heidelberg, Germany — 2Kirchhoff-Institute for Physics, Heidelberg, Germany
We have developed an Atom Trap Trace Analysis setup of 39Ar as well as an extraction and separation system for water and ice samples. For the explicit demonstration of application, we took large groundwater samples, degassed them in the field and separated argon by a gas chromatographic technique. The argon purification of ice samples is realized with a setup based on a titanium getter. With argon purities of about 98% and recoveries above 90%, the setup fulfills the sample requirements of the ATTA apparatus for 39Ar dating. Only small modifications of the ice purification setup are required to adapt the sample preparation method to ocean samples.