Table 3. Number-average molecular weight (Mn), weight-average molecular weight (Mw) and polydispersity (PDI) of KL, ESL and EIL determined by GPC
| Variable | KL | ESL | EIL |
| Mn (Da) | 840 | 490 | 770 |
| Mw (Da) | 3,140 | 1,340 | 4,970 |
| PDI | 3.71 | 2.72 | 6.50 |
KL: kraft lignin, ESL: ethanol-soluble lignin, EIL: ethanol-insoluble lignin, GPC: gel permeation chromatography.