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. 2023 Jun 30;15(13):2901. doi: 10.3390/polym15132901

Table 1.

Analysis type and type of lignin raw material.

Analysis Type Lignin Raw Material
Neat FTIR-ATR Acetylated lignin
FTIR-ATR on lignin in DMSO-d6 Acetylated lignin
Transmission FTIR in KBr Acetylated lignin
Non-aqueous potentiometric titration Unmodified lignin
Amount of acetic acid consumed (total OH) Reaction solvent after acetic anhydride hydrolysis, buffering, and removal of lignin via filtration
Size exclusion chromatography (SEC) Unmodified lignin