Grain-scale stable carbon and oxygen isotopic variations of the international reference calcite, IAEA-603.
Kozue NishidaToyoho IshimuraPublished in: Rapid communications in mass spectrometry : RCM (2018)
Low-abundance opaque grains (1-2 grains out of 100 grains) have lower δ13 C and δ18 O values, suggesting that these grains should be eliminated when using IAEA-603 for single-grain (microscale) isotope analysis.