IAEA-C2 travertine was obtained from a fresh water travertine deposit collected near Munich, Germany, and was homogenized at the IAEA. The recommended value of the quality control material is the result of the statistical evaluation of an interlaboratory comparison .
(SD) Estimated standard error of the mean
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)
Rozanski, K., Stichler, W., Gonfiantini, R., Scott, E. M., Beukens, R. P., Kromer, B., van der Plicht, J. (1992): The IAEA 14C Intercomparison exercise 1990. Radiocarbon, 34 (3), 506-519.