The reference material IAEA-CO-8* is a natural carbonatite originating from Schelingen at the Kaiserstuhl, Germany. The material was ground to a grain size from 0.09 to 0.5 mm and put at the IAEA’s disposal by Geologisches Landesamt, Freiburg, Germany [1]. Its recommended δ13C value was determined in an international calibration [2]. The recommended δ18O value is a mean from data of an interlaboratory comparison [1].
The material contains other mineral grains and may not be recommended for analysis of small aliquots.
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)[*] previously identified as IAEA-KST
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