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Title: Lignin quantitation by FT-Raman Spectroscopy

Source: In: Proceedings 16th international symposium on wood, fiber and pulping chemistry. 2011 June 8-10. Tianjin, China. Beijing, China: China Light Industry Press: 170-173. 2011

Author(s)Agarwal, Umesh P.

Publication Year: 2011  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4709-3A

Abstract: Because of the structural complexity of biomass, quantitation of lignin in a variety of wood and plant cell walls is difficult. Consequently, to measure lignin in different plant species, a number of different methods exist. The methods can give different values for the same material samples and such differences result from the nature of the biomass. In the past, although there have been many applications of Raman spectroscopy in the studies of lignin, so far, for most materials, quantitation of lignin has proven to be a challenge. In the present work, a novel approach that successfully quantified lignin is described. The strategy, in part, was based upon the minimization of the contributions to the lignin band intensity at 1600 cm-1 by those structures that contribute to it excessively, namely chromophores and aromatic-ring conjugated units in lignin. Using a variety of samples with lignin composition in the range 4.9 to 48.4 % good linear correlations against Klason and total lignins were developed (coefficients of determination R2 0.97 and 0.95, respectively).

Keywords: Raman spectroscopy, lignin, Fourier transform spectroscopy, wood chemistry, lignin analysis, spectroscopy, chemical composition, plant cell walls, analytic chemistry, correlation, measurement, lignin chemistry, FT-Raman spectroscopy, milled-wood lignin, aromatic rings, chromophores, review article, quantitation

Publication Review Process: Non-Refereed (Other)

File size: 297 kb(s)

Date posted: 09/07/2011
RITS Product ID: 39854
Current FPL Scientist associated with this product
Agarwal, Umesh P.
Research Chemist

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