Signal (ppm)
Assignment
150
Aliphatic-OH
146-145
Condensed phenolic units
140-141
Syringyl phenolic-OH
137.5
Guaiacyl phenolic-OH
132.5
p-Hydroxyphenyl-OH
131-130
Carboxylic acid units
Table 3:
Signal Assignments of SKL and DL by
31
P-NMR spectrometry.
