IAEA-C3 cellulose was prepared by W.G. Mook and J. van der Pflicht. The starting material was a batch of cellulose produced in 1989 from one season’s harvest of ca. 40 year old trees. It is intended only for 14C analyses. The material was homogenized at quantities of 50 gram only. It is therefore not suitable as reference material for stable isotope determinations due to a possible isotopic inhomogeneity for stable isotopic measurements at small analyzed amounts, both within a supplied cellulose sheet and between different samples (For stable isotope applications IAEA-CH-3 cellulose is available). 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.