Table 1.

Comparison of relative composition of raw birchwood and lignin-rich precipitate (LRP) after pretreatment

	Structural arabinan	Structural 4-O-Me-glucuronoyl	Structural glucan	Structural xylan	Lignin	Structural acetate
mg/g DM
Raw birchwood	4.49 ± 1.12	n.d.	449.03 ± 26.33	297.08 ± 20.85	198.36 ± 1.97	2.75 ± 0.05
LRP	0.08 ± 0.02	2.39 ± 0.30	0.51 ± 0.07	11.43 ± 2.3	902.05 ± 27.91	0.81 ± 0.17

Values obtained by acid hydrolysis represent relative concentrations as an average of three replicates ± standard deviations based on dry matter of each fraction (mg/g DM). See Additional file 2 for complete description of methods. n.d. not determined