Dear All I'm currently running some fish samples that may or may not have been contaminated with soot (from a bunsen burner). Does anyone have a typical delta 13C value for soot? best regards Chris ><> ><> ><> ><> ><> ><> ><> ><> ><> Dr Chris Harrod Max Planck Institute for Limnology Dept Physiological Ecology Postfach 165 D-24302 Plon Germany [log in to unmask] Tel: +49 (0)4522 763 283 Mob: +49 (0)1711 876 216 Fax: +49 (0)4522 763 310 www.mpil-ploen.mpg.de/ <>< <>< <>< <>< <>< <>< <>< <>< <><