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| Isotopic system | Average pairwise difference (‰) | Average intra-laboratory standard deviation (‰) | MMD (‰) |
| δ13Cap | 0.6 | 0.15 | 1.2 |
| δ18Oap | 2 | 0.28 | 3.1 |
| δ13Ccol | 0.2 | 0.1 | 0.6 |
| δ15Ncol | 0.4 | 0.13 | 0.9 |
