Table 2. Theoretical Calculation of Iodine Fractionation Affected by Increasing Oxygen Concentration Using Various Protocolsa.
| fractionation |
||||||||
|---|---|---|---|---|---|---|---|---|
| protocol | vol. of bottles (mL) | vol. of R2 (mL) | [I–] in R2 (M) | final volume (mL) | assumed [O2] (μM) | (I3–)% | (I2)% | change of (I3–)% per 100 μM O2 |
| Shibala | 60 | 0.5 | 4 | 60.5 | 100 | 95.93% | 4.07% | |
| 200 | 95.86% | 4.14% | –0.07% | |||||
| 300 | 95.78% | 4.22% | ||||||
| Labasque | 146 | 0.9 | 4 | 146.9 | 100 | 94.55% | 5.45% | |
| 200 | 94.42% | 5.58% | –0.14% | |||||
| 300 | 94.29% | 5.71% | ||||||
| APHA | 300 | 1 | 0.87 | 301 | 100 | 63.20% | 36.80% | |
| 200 | 57.53% | 42.47% | –11.14% | |||||
| 300 | 50.38% | 49.62% | ||||||
| Grasshoff | 50 | 0.5 | 3.61 | 50.5 | 100 | 96.23% | 3.77% | |
| 200 | 96.17% | 3.83% | –0.06% | |||||
| 300 | 96.10% | 3.90% | ||||||
a
Calculations were made at a temperature of 25 °C.