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    Fourier transform infrared spectroscopy (FTIR) is a simple nondestructive technique that allows the user to obtain quick and accurate information about the structure of the constituents of wood. Spectra deconvolution is a computational technique, complementary to FTIR analysis, which improves the resolution of overlapped or unobserved bands in the raw spectra. High performance liquid chromatography (HPLC) is an analytical technique useful to determine the ratio of the lignin monomers obtained by the alkaline nitrobenzene oxidation method. Furthermore, lignin content has been commonly determined by wet chemical methods; Klason lignin determination is a quick and accessible method. Here, we detail the procedures for chemical analysis of the wood lignin using these techniques. Additionally, the deconvolution process of FTIR spectra for the determination of the S/G ratio, in lignin isolated by this or other methods, is explained in detail. © 2024. The Author(s), under exclusive license to Springer Science+Business Media, LLC, part of Springer Nature.


    Jorge Reyes-Rivera, Teresa Terrazas. Lignin Analysis by HPLC and FTIR: Spectra Deconvolution and S/G Ratio Determination. Methods in molecular biology (Clifton, N.J.). 2024;2722:149-169

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    PMID: 37897607

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