Contamination and Fractionation Effects in AMS-Measured 14C/12C and 13C/12C Ratios of Small Samples

Cees Alderliesten, Klaas van Der Borg and Arie de Jong

In AMS measurements on small (m "d 400 µg) carbon samples, an m-dependence has been noted for the 14C/12C and 13C/12C ratios that is due to the combined effect of contamination and fractionation. A simple formalism is presented to describe the phenomena and to correct measurements on unknowns for their effect.

[Radiocarbon Volume 40, Numbers 1-2, 1998]