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Table 2
Mass fragments used to monitor potentially desorbing species into the gas phase.
| Molecule | Molecular ion | Main mass fragment | Mass fragment used | Notes |
|
|
||||
| C2H5OH | 45 | 31 | 45 | m/z = 31 was common to CH3OH |
| H2O | 18 | 18 | 18 | |
| CH4 | 16 | 16 | 15 | m/z = 16 was common to H2O |
| Contribution from CH3OH molecules was negligible | ||||
| CH3OH | 32 | 31 | 31 | CH3OH could not be unambiguously detected in the |
| gas phase during C2H5OH irradiation (see text) | ||||
| H2CO | 30 | 29 | 29 | m/z = 30 was also used (see text) |
| CH3CHO | 44 | 29 | 43 | m/z = 29 was common to H2CO |
| m/z = 44 was common to CO2 | ||||
| CH3CHO was not detected in the gas phase during | ||||
| irradiation in both series of experiments | ||||
| C2H6 | 30 | 28 | 27 | m/z = 28 was common to CO |
| m/z = 30 was common to H2CO | ||||
| CO | 28 | 28 | 28 | Contribution from other species was negligible |
| CO2 | 44 | 44 | 44 | CO2 was not detected in the gas phase during |
| irradiation in both series of experiments | ||||
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