Table 3 Most relevant py-TMAH-GC/MS mass spectrum fragmentation peaks for the materials characterization across the samples
RT (min) | m/z | Assignment |
|---|---|---|
16.25 | 55, 69, 74, 83, 87, 111, 129(100), 138, 171, 188 | Dimethyl phthalate |
17.50 | 74(100), 87, 97, 111, 143, 152, 178, 185 | Dimethyl azelate |
21.68 | 74(100), 87, 101, 129, 145, 185, 227, 270 | Methyl palmitate |
23.60 | 74(100), 87, 129, 143, 199, 255, 298 | Methyl stearate |
25.47 | 187, 207, 253(100), 313, 328 | 7-Oxodehydroabietic acid, methyl ester |
25.57 | 141, 155, 197, 239(100), 253, 314 | Methyl dehydroabietate |
30.08 | 79(100), 121, 138, 160, 189, 205, 442 | Betullin |