DPG Phi
Verhandlungen
Verhandlungen
DPG

Hannover 2010 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

MS: Fachverband Massenspektrometrie

MS 4: Beschleunigermassenspektrometrie und Anwendungen I

MS 4.8: Talk

Wednesday, March 10, 2010, 12:30–12:45, F 428

14C AMS measurement and sample preparation methods of µg-sized carbon samples — •Jakob Liebl1, Simon Fahrni2, Robin Golser1, Walter Kutschera1, Klaus Mair1, Alfred Priller1, Peter Steier1, Iris Vonderhaid1, Lukas Wacker3, and Eva Maria Wild11Vienna Environmental Research Accelerator (VERA), Faculty of Physics - Isotope Research, University of Vienna, Austria — 2Department of Chemistry and Biochemistry, University of Bern, Switzerland — 3Ion Beam Physics, Physics Department, ETH Zurich, Switzerland

14C AMS measurement and sample preparation methods for µg-sized samples have been developed at VERA. Overall measurement uncertainties do not primarily originate from the uncertainty of the AMS measurement itself, but are strongly affected by carbon contamination introduced during sample preparation. In contrast to contamination levels at graphitization, contamination introduced at earlier steps of sample preparation is sparsely investigated. At VERA, procedures with no detectable (<0.2 µg C) carbon contamination during graphitization, and contamination below 0.4 µg C during sample combustion and pretreatment were developed. Sample preparation procedures and graphitization protocols currently applied for small samples are presented. We will also discuss results of comparative AMS measurements of CO2 samples (10 µg C), either graphitized and measured at VERA or introduced as CO2 into a gas ion source installed at a MICADAS facility of the ETH Zurich. With both methods, we have reached a precision level of about 1% for 14C measurements of 10 µg C samples.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2010 > Hannover