Structure

Chemical shift range (ppm)

mmol/g lignin

MWL

ILL

EOL

Aliphatic OH

150 - 145

3.59

1.55

0.98

Syringyl OH

144.5 - 140.5

0.39

0.31

1.24

Guaiacyl OH

140.5 - 138.5

0.48

0.2

0.73

p-hydroxyphenyl OH

138.5 - 136.5

0.45

0.2

0.38

Carboxylic

135 - 133

0.16

0.12

0.21