I am trying to obtain some Merck CaCO3 with known d13C (and 13C depleted) composition.

Does anyone know where that can be purchased, or would be willing to sell/share a modest amount? I’m after ~ 200 mg or so.




Dr Shaun Barker
Senior Lecturer, Earth Sciences
School of Science
University of Waikato
Private Bag 3105
Hamilton 3240
New Zealand
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Ph: + 64 7 838 4514