Table 3.
Accurate masses of the glycan oxonium- and glycan-related fragment ions and most plausible empirical formulae
| Observed m/z | Calculated m/z | Elemental composition | Δ m/z (mmu)a | Gross formula shift related to 242.078 |
|---|---|---|---|---|
| 86.0952 | 86.0963 | C5H12N | −1.764 | -HPO3, -H2O, -CO2, -CH2 |
| 100.1108 | 100.1120 | C6H14N | −1.794 | -HPO3, -H2O, -CO2 |
| 130.0849 | 130.0862 | C6H12O2N | −1.854 | -HPO3, -H2O, -CH2 |
| 144.1006 | 144.1018 | C7H14O2N | −1.824 | -HPO3, -H2O |
| 162.1112 | 162.1124 | C7H16O3N | −1.828 | -HPO3 |
| 228.0620 | 228.0631 | C6H15O6NP | −1.689 | -CH2 |
| 242.0776 | 242.0787 | C7H17O6NP | −1.759 | |
| 204.0855 (HexNAC control) | 204.0865 | C8H14O5N | −1.717 |
a
Difference between observed and predicted m/z values, in molecular mass units (mmu).