Table 1. Overview of Lignin Samples Used in This Study.
| sample alias | botanic origin | separation process | other information |
|---|---|---|---|
| ASL1 | Arkansas/straw | soda pulping | |
| ASL2 | Arkansas/straw | soda pulping | |
| ASL3 | Arkansas/straw | soda pulping | |
| SSL1 | Norwegian spruce | soda pulping | high purity |
| SSL2 | Norwegian spruce | soda pulping | ultrahigh purity |
| SSL3 | Norwegian spruce | soda pulping | low purity |
| SKL1 | softwood | kraft pulping | |
| SKL2 | softwood | kraft pulping | |
| SKL3 | softwood | kraft pulping | LignoBoost |
| SOL | Norwegian spruce | organosolv pulping | |
| AL | N/A | alkali pulping |