TABLE 1.
Accuracy and precision of stable hydrogen isotope ratio measurements by the platinum catalyzed H2-water equilibration method using international water reference materials1
| References | Accepted δ2H value | Measured δ2H value2 | Accuracy2 | Mean accuracy | Overall precision3 |
| o/oo | |||||
| GISP | −189.7 (−190.2 to −189.1) | −189.7 ± 1.3 | −0.0 | +0.7 | 1.5 |
| −190.1 ± 1.7 | −0.4 | ||||
| −188.8 ± 1.5 | +0.9 | ||||
| IAEA 302A | 506.2 (504.0–508.4) | 504.8 ± 2.4 | −1.4 | −1.4 | 4.0 |
| 507.9 ± 3.4 | +1.7 | ||||
| 503.0 ± 4.4 | −3.2 | ||||
| 503.5 ± 5.4 | −2.7 | ||||
| IAEA 302B | 992.3 (985.6–999.0) | 991.6 ± 2.4 | −0.7 | +2.8 | 2.7 |
| 995.4 ± 3.0 | +3.1 | ||||
| 998.7 ± 3.2 | +6.4 | ||||
| 994.8 ± 2.1 | +2.5 | ||||
1
Values are mean ± SD or accepted values (95%CI), n = 10. GISP, Greenland Ice Sheet Precipitation; 2H, deuterium; IAEA 302A, International Atomic Energy Agency 2H enriched reference water material 302A; IAEA 302B, International Atomic Energy Agency 2H enriched reference water material 302B.
2
Accuracy (o/oo) = measured δ2H value (o/oo) – accepted δ2H value (o/oo).
3
Overall precision (o/oo) = 
, where SD is the internal precision or SD of each set of measurements and n is the total number of sets of δ2H values used in the evaluation.