The Malaysian Journal of Analytical Sciences Vol 11 No 1 (2007): 206 – 212

 

 

COMPARISON STUDIES ON SODA LIGNIN AND SODA- ANTHRAQUINONE LIGNIN

 

M. N. Mohamad Ibrahim, N. N. Mohamad Yusof and A. Hashim

 

School of Chemical Sciences, Universiti Sains Malaysia,

11800 Minden, Pulau Pinang, Malaysia

 

Abstract

Soda lignin and soda anthraquinone lignin were compared in this study. The physico-chemical properties and structural features of the isolated lignin were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Ultraviolet (UV), ash test, Carbon-Hydrogen-Nitrogen (CHN) analyzer, Nuclear Magnetic Resonance (¹³C-NMR) and High Performance Liquid Chromatography (HPLC). Nitrobenzene oxidation was performed  on these two types of lignin especially for the HPLC analysis. Based on the CHN, ¹³C-NMR and UV results there were no significant differences between soda lignin and soda anthraquinone lignin. The FTIR results also showed that there were no significant differences in terms of functional groups

that exist in both lignin.

 

Keywords: Oil palm empty fruit bunches fibers, black liquor, soda lignin, soda anthraquinone lignin

 

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