Molecular weight distribution of aspen lignins from conventional gel permeation chromatography, universal calibration and sedimentation equilibrium

Authors

M.E. Himmel
K. Tatsumoto
K. Grohmann
D.K. Johnson
H.L. Chum

Document Type

Article

Journal/Book Title/Conference

Journal of Chromatography

Volume

498

Issue

1

First Page

93

Last Page

104

Publication Date

1990

Abstract

Molecular weight distributions of ball-milled, organosolv, alkali-extracted/mild acid-hydrolyzed and alkali-extracted/steam-exploded aspen lignins in tetrahydrofuran were compared using conventional gel permeation chromatography (GPC), universal calibration and sedimentation equilibrium. Molecular weight averages reported in the literature from universal calibration for the four low-molecular-weight lignins agreed more closely with values found in this study from sedimentation equilibrium experiments than from conventional GPC. This result supports the suggestion that these acetylated lignins fit universal calibration.

Recommended Citation

Himmel, M. E. 1990. Molecular weight distribution of aspen lignins from conventional gel permeation chromatography, universal calibration and sedimentation equilibrium. Journal of Chromatography. 498 (1): 93-104.