Summary of characteristics identified by FT-ICR MS analysis of degraded (laccase-treated) and non-degraded (negative control) lignin. Standard deviation is shown in brackets and all 13C-containing ions are excluded.
| Treatment | Timepoint (hours) | Average no. of assigned ions | Double bond equivalents (DBE) | C | H | O | M w (Da) | O/C ratio | H/C ratio |
|---|---|---|---|---|---|---|---|---|---|
| Negative | 0 | 4005 | 15.4 (10.2) | 32.3 (14.3) | 35.7 (16.9) | 10.5 (5.4) | 606.4 (229.0) | 0.37 (0.22) | 1.15 (0.37) |
| 2 | 3916 | 15.3 (10.0) | 31.3 (13.8) | 34.0 (15.7) | 10.5 (5.3) | 593.6 (220.0) | 0.38 (0.22) | 1.13 (0.37) | |
| 24 | 3933 | 15.4 (10.2) | 31.7 (14.1) | 34.5 (16.7) | 10.6 (5.4) | 599.2 (225.5) | 0.38 (0.22) | 1.14 (0.38) | |
| Laccase-treated | 0 | 4057 | 14.9 (10.1) | 31.6 (14.1) | 35.3 (17.2) | 10.5 (5.4) | 597.2 (226.0) | 0.38 (0.22) | 1.16 (0.38) |
| 2 | 3716 | 14.7 (9.5) | 30.2 (13.3) | 33.0 (16.5) | 10.5 (5.4) | 579.6 (215.3) | 0.39 (0.23) | 1.13 (0.38) | |
| 24 | 3081 | 13.7 (9.7) | 27.5 (11.7) | 29.5 (15.5) | 10.2 (5.3) | 538.6 (191.7) | 0.42 (0.24) | 1.13 (0.42) |