Isolation of a Syringyl-β-O-4 Rich End-Wise Type Lignin Fraction from Birch Periodate Lignin

Abstract
A fraction of lignin which was almost mono-disperse was isolated from an acetylated birch periodate lignin, and its chemical structure was investigated by various NMR experiments. It was proved that the fraction was composed mainly of non-phenolic syringyl-β-0-4 structures.