Table 5.
Determination of mass spectrometric bias
| Calibration sample No. |
Isotopic ratio, 24Mg/26Mg | Correction factor (2 mass units) | ||||
|---|---|---|---|---|---|---|
| Calc. | MS-2(a) | MS-2(b) | MS-4 | MS-2 (Avg. a+b) | MS-4 | |
| I | 1.005055 | 1.01045 | 1.01270 | 1.02055 | 0.993556 | 0.984817 |
| II | 1.88752 | 1.89905 | 1.90170 | 1.91525 | .993231 | .985521 |
| III | 6.67364 | 6.72875 | 6.71645 | 6.77655 | .992718 | .984814 |
| IV | 8.22798 | 8.27785 | 8.30795 | 8.33550 | .992174 | .987101 |
| V | 6.94706 | 7.01270 | 7.01215 | 7.04800 | .990679 | .985678 |
| VI | 7.43012 | 7.50615 | 7.47955 | 7.53350 | .991631 | .986277 |
| Mean of samples III, IV, V, and VI. | 0.991801 | 0.985968 | ||||