mmol/g lignin

Functional group

MWL

ILL

EOL

Methoxy

4.3 ± 0.0

2.9 ± 0.0

4.2 ± 0.0

Carbonyl

1.5 ± 0.0

0.2 ± 0.1

3.0 ± 0.1

Carboxyl

0.8 ± 0.0

0.5 ± 0.0

1.1 ± 0.1

Phenolic OH

1.5 ± 0.9

1.5 ± 0.1

2.4 ± 0.1

Aliphatic OH

2.5 ± 0.5

5.1 ± 0.1

2.2 ± 0.1