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List of international and in-house standards used for the EA-IRMS and GB-IRMS analyses.
| Description | Nature | Analysis | δ13C (‰) | SD |
|---|---|---|---|---|
| IAEA-CH6 | Sucrose (C12H22O11) | 13C-POC | −10.45 | 0.03 |
| IAEA-600 | Caffeine (C8H10N4O2) | 13C-POC | −27.77 | 0.04 |
| Acetanilide | Acetanilide (C8H9NO) | 13C-POC | +29.53 | 0.01 |
| CA21 (in-house std) | Calcium carbonate (CaCO3) | 13C-DIC | +1476 | |
| Na2CO3 (in-house std) | Sodium carbonate | 13C-DIC | −6.8805 | |
| NaHCO3 (in-house std) | Sodium bicarbonate | 13C-DIC | −5.9325 |
