The result indicated that, the purified lignin was composed of syringyl (S) and guaiacyl (G) units, they were bound mainly through ester linkage and C-C bonds.

• 结果表明，造纸黑液纯化木素主要由紫丁香基单元和愈疮木基单元两种结构单元组成，其结构单元间主要是通过醚键和C-C键连接在一起；