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Table 1 Composition of spruce, expressed as % dry matter

From: The influence of solid/liquid separation techniques on the sugar yield in two-step dilute acid hydrolysis of softwood followed by enzymatic hydrolysis

Composition Dry matter (%) Material (I) Dry matter (%) Material (II)
Glucan 45.4 44.8
Xylan 3.8 6.0
Galactan 3.2 2.5
Arabinan 1.3 1.3
Mannan 10.3 13.8
Total lignin 31.5 28.9
Other components2 4.5 2.7
  1. 1 Total lignin is the sum of the acid-soluble and insoluble lignin.
  2. 2 Other components are extractives, ash, proteins, and some unknown compounds.