Abstract
A method for lignin quantification is presented that is based on densitometry and multivariate calibration by partial least squares (PLS). Densitometry removes interferences otherwise caused by und...
Highlights
Lignin is a main constituent of lignocellulosic biomass, and its successful industrial utilization as a material would unlock a vast nonfossil, renewable resource
In quantitative high-performance thin-layer chromatography (HPTLC), calibrations cannot be transferred from one thin-layer plate to another
Detection of the target analyte is conducted before chromatography, rendering the need to develop the standards unnecessary; they can be applied anywhere to the plate, preferably outside and beside in French, à côtethe chromatography area of the plate
Summary
Lignin is a main constituent of lignocellulosic biomass, and its successful industrial utilization as a material would unlock a vast nonfossil, renewable resource. A major obstacle in this endeavor is the heterogeneous nature of lignin. Its biosynthesis is based on a nondirected radical polymerization reaction, making use of two or three prevalent and several minor monomers.[1] Different linkage types can form during monomer addition, resulting in a complex, nonuniform heteropolymer.[2] The larger part of potentially available lignin is produced during pulp production, and a successful utilization as material is rarely implemented. The substance class “lignin” covers polymers of widely different chemical structures, and it is very difficult if not impossible to identify a characteristic chemical structure that could form the vantage point for a quantitative lignin analysis
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