Fourier Transform Infrared characterization of Pai wood (Afzelia africana Smith) extractives
Tóm tắt
The major functional groups of the various extractive components recovered from Pai wood using organic solvents and hot water have been identified and assigned by means of Fourier transform infrared analyses. The analyses revealed that the components removed by toluene, found mainly in cell lumina and/or lumina surfaces, were predominantly of non-polar, aliphatic compounds such as fatty acids and their monohydric esters. Gummy substances were also evident as well as minor amounts of materials of aromatic nature. The extract fractions recovered using ethanol and hot water, derived principally from within cell walls, consisted of cyclized aromatic components of increased polarity. It has been demonstrated that these components are tannins.
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