Table 4 The influence of an extraction step on the lignin and carbohydrate content of the original biomass (% dry weight of the original biomass)
Extractives | Acid insoluble lignin | Hemicellulose** | Glucan | ||||||
|---|---|---|---|---|---|---|---|---|---|
Extraction | Water | Water + Ethanol | Unextracted | After water extraction | After water followed by ethanol extraction | Unextracted | After water followed by ethanol extraction | Unextracted | After water followed by ethanol extraction |
BKLPP | 2.6 (0.2)* | 3.8 (0.2) | 28.2 (0.8) | 25.0 (0.8) | 24.9 (1.2) | 21.6 (0.6) | 22.0 (0.2) | 42.4 (0.3) | 42.3 (0.7) |
IFS | 4.1 (0.3) | 6.3 (1.1) | 33.3 (0.4) | 26.7 (0.3) | 23.5 (0.7) | 24.0 (0.2) | 20.3 0.4) | 36.1 (0.8) | 37.6 (1.0) |
LR | 5.2 (0.3) | 9.4 (0.1) | 38.6 (0.7) | 28.2 (0.1) | 25.8 (1.2) | 18.7 (0.4) | 20.2 (0.3) | 33.6 (1.0) | 35.5 (0.9) |
HOG I | 3.6 (0.1) | 6.2 (0.2) | 42.8 (0.1) | 39.8 (0.5) | 36.1 (0.2) | 14.1 (0.3) | 14.4 (0.1) | 29.6 (0.3) | 31.5 (0.2) |
HOG II | 3.5 (0.7) | 5.7 (0.3) | 39.7 (0.2) | 35.4 (1.8) | 33.8 (0.2) | 15.6 (0.2) | 16.1 (0.6) | 37.5 (0.7) | 36.7 (1.6) |
BARK | 13.6 (1.2) | 19.0 (1.5) | 52.7 (0.5) | 39.4 (1.1) | 34.5 (0.7) | 14.5 (0.1) | 12.5 (0.1) | 19.2 (0.0) | 19.0 (0.3) |