Table 6.

Results of the determination of phenolic hydroxyl groups expressed as vanillin equivalents in the lignin fractions recovered from aqueous and organic processes applied on K-LF-0 (expressed in mmol/g) in the dry lignin. Estimated standard errors ±0.2 mmol/g vanillin equivalent (1 σ, from calibration data).

Fraction	Vanillin Equivalent Content (mmol/g)
K-LF-0	4.79
K-LFa-R5	2.28
K-LFa-R2	2.99
K-LFa-P2	3.87
K-LFo-R5	5.90
K-LFo-R2	5.80
K-LFo-P2	4.16