Table 2. Relative Amount of Aldonic Acids in the Crude Products of Glucose Ammoxidation at 70 °C, 100 °C, and 140 °C (0.2 MPa O2, 3 h).
| relative
percentagea |
|||||
|---|---|---|---|---|---|
| Rt (min) | aldonic acid | 70 °C | 100 °C | 140 °C | |
| C2 | 12.30 | glycolic acid (36) | 6.3 | 9.7 | 9.7 |
| C3 | 19.66 | glyceric acid (42) | 14.4 | 13.6 | 5.0 |
| C4 | 25.21 | erythronic acid (49) | 27.3 | 14.9 | 3.1 |
| C4 | 25.62 | threonic acid (50) | 2.4 | 2.7 | 1.5 |
| C5 | 30.26 | ribonic acid (56) | 6.1 | 5.2 | 2.4 |
| C5 | 30.61 | arabinonic acid (57) | 97.3 | 23.3 | 2.8 |
| C6 | 35.06 | mannonic acid (66) | 9.1 | 1.4 | 0.0 |
| C6 | 34.37 | gluconic acid (66) | 10.9 | 2.3 | 0.0 |
| sum | 173.8 | 73.1 | 24.5 | ||
a
Values were calculated as ratio of the relative peak areas of aldonic acids and the internal standard phenyl α-glucoside (200 μg).