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| δ13CCARBOXYL (‰ versus VPDB) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ile | Leu | |||||||
| known | meas. | meas.-known | known | meas. | meas.-known | |||
| Leu1 | -12.21 | -21.31 | -9.10 | -12.55 | -9.66 | 2.89 | ||
| Leu2 | -12.21 | -20.91 | -8.70 | 2.30 | 4.75 | 2.45 | ||
| Leu3 | -12.21 | -21.29 | -9.08 | 15.56 | 18.51 | 2.95 | ||
| mean | -8.96 | ± 0.22 | 2.76 | ± 0.27 | ||||
A sample of natural Ile with an assigned δ13CCARBOXYL = -12.21 ‰ was blended with each of three isotopically enriched Leu samples.
