A chemometric approach for the segregation of bark biomass based on tree height and geographic location

A chemometric approach is presented to differentiate and segregate bark biomass variability by proportionating the chemical functionality of components based on solid state NMR. Bark can vary from the tree base to the canopy, and as a biomass source, it would be desirable to assess and predict bark...

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Bibliographic Details
Published inJournal of wood chemistry and technology Vol. 40; no. 6; pp. 361 - 369
Main Authors Raymond, Laura G., Hill, Stefan J., Grigsby, Warren J., Bogun, Ben R.
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 01.10.2020
Taylor & Francis Ltd
Subjects
Bark
bark processing
Biomass
Carbohydrates
Chemical composition
Clustering
Functional groups
Geographical locations
NMR
Nuclear magnetic resonance
Phenolic compounds
Phenols
Pinus radiata
Polyphenols
principal component analysis
Principal components analysis
Solid-state NMR
Tannins
Trees
Water treatment
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Summary:A chemometric approach is presented to differentiate and segregate bark biomass variability by proportionating the chemical functionality of components based on solid state NMR. Bark can vary from the tree base to the canopy, and as a biomass source, it would be desirable to assess and predict bark compositional variations to optimize biomass use. In this study, principal component analysis (PCA) was used to relate chemical compositions of various Pinus radiata pine barks with respect to tree height and geographic location, and after removal of water-soluble compounds. NMR spectra were bucketed to encompass major chemical functional groups and then PCA was applied. The analysis revealed sample clustering by tree height as was evident from the loadings plots and were attributed to phenolic, di-O-alkyl/aromatic, and O-alkyl regions. Bark samples were found to have distinct differences by tree height. These were dominated by chemical functional groups consistent with condensed tannins (polyphenols) and carbohydrate components, respectively. The analysis revealed no significant differences by geographic location. Similarly, hot water extracts and the extracted bark were distinguished by tree height based on their polyphenol and carbohydrate components.
ISSN:0277-3813
1532-2319
DOI:10.1080/02773813.2020.1825494