Official Journal of the Japan Wood Research Society
Table 3 Lignin-derived dimeric products in water-soluble portion and their retention times and MS fragments for GC–MS analysis
No. | Retention time (min) | Product | MS fragments (m/z) |
|---|---|---|---|
20 | 38.7 | Stilbene type (β-1) | 272, 240, 226, 212, 198, 180, 170, 152, 138, 77, 66 |
21 | 41.4 | 281, 274, 260, 230, 214 | |
22 | 42.3 | 278, 275, 245, 160, 153, 124, 109, 78, 66, 52 | |
23 | 43.2 | 290, 152, 139, 124, 108, 94, 78, 66 | |
24 | 43.7 | 429, 377, 356, 301, 273, 160, 153, 124, 96, 78, 66, 53 | |
25 | 43.9 | 311, 300, 287, 272, 256, 240, 161, 152, 95, 78, 67 | |
26 | 44.3 | Phenylcoumaran type (β-5) | 272, 241, 225, 213, 212, 199, 169 |
27 | 45.0 | 303, 273, 153, 124, 108, 82, 78, 66, 53 | |
28 | 45.7 | 358, 313, 298, 282, 253, 210, 181, 162, 79, 52 | |
29 | 46.9 | 357, 341, 313, 286, 269, 208, 175, 160, 152, 137, 78 | |
30 | 47.7 | 344, 326, 312, 207, 139, 121, 93, 78, 66 | |
31 | 48.8 | Biphenyl type (5-5′) | 326, 312, 298, 266, 190, 177, 162, 139, 124, 104, 92, 78 |
32 | 49.0 | 314, 298, 252, 239, 178, 138, 95, 78 | |
33 | 51.1 | 327, 324, 312, 135, 130, 78 |