IAEA-C4 was produced from sub-fossil wood excavated from peat bogs in the north island of New Zealand near Waikato by W. G. Hogg and H. A. Polach. The recommended value of the quality control material is the result of the statistical evaluation of an interlaboratory comparison . Only a range is provided for the 14C activity due to its proximity to the detection level of used techniques.
|14C||[0.20 ... 0.44]#||Range, pMC||-||R|
(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.