Chemical components from the bark layers of Eucalyptus pellita F Muell.

Abstract The utilization of E. pellita bark as waste is still not widely carried out due to a lack of information about the chemical content. Therefore, the current study aimed to analyze the chemical content of the bark of E. pellita using pyrolysis-gas chromatography-mass spectrometry (PyGCMS). The results showed the total extractive content of E. pellita’s inner bark, outer bark, and mix-bark was 12.17%, 16.19%, and 14.85%, respectively. The holocellulose content of E. pellita mix-bark was 65.45%, while the inner bark and outer bark were 60.68% and 59.29%, respectively. The alpha-cellulose content of E. pellita bark was 57.97%, while the inner and outer barks were 56.43% and 54.14%; the lignin content of the clason mix-bark of E. pellita was 25.39%, and for the inner bark and outer bark were 28% and 26.72%, respectively. The results of pyGCMS showed that the extractives of the bark of E. pellita were catechol, 3-methyl-catechol, resorcinol, 3,5-Dimethoxy-4-hydroxytoluene, and (E)-3,3′-Dimethoxy-4,4′-dihydroxystilbene

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