Douglas Fir Wood

gift from Flammability Research Center, Salt Lake City, USA

suspension in methanol; 10 yg standard

REMARKS - The overall pyrolysis mass spectrometry patterns of whole wood samples can be explained to a large extent by adding the pattern of cellulose (Spectrum A.l) to a typical lignin pattern (Spectra E.9, E.10), taking into account the softwood or hardwood nature of the sample (see Remarks on Spectrum E.9). The major peak intensities not explained by this procedure, usually found at m/z 114 and 128, apparently represent hemicellulose fragments. Comparison with spectra of whole wood samples representing different types of wood shows characteristic differences with regard to lignin and hemicellulose patterns which should be of considerable practical value in industrial applications and technical uses of wood and wood products.

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