Comparative Analysis of Alkaline-Extracted Hemicelluloses from Beech, African Rose and Agba Woods using FTIR and HPLC
| Autor: | AL Ezugwu, Victoria Ottah, Ezike Christian Tobechukwu, F. C. Chilaka |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
History Polymers and Plastics Mannose Rosewood Industrial and Manufacturing Engineering chemistry.chemical_compound chemistry Absorption band Monosaccharide Hemicellulose Business and International Management Absorption (chemistry) Fourier transform infrared spectroscopy Sugar Nuclear chemistry |
| Zdroj: | SSRN Electronic Journal. |
| ISSN: | 1556-5068 |
| DOI: | 10.2139/ssrn.3951072 |
| Popis: | The vast application of hemicellulose in industry is greatly influenced by its chemical components. The hydroxyl spectra vibrations (3919-3671 cm -1 ) from the FTIR spectra indicates the presence of non-hydrogen bonded OH stretch and normal polymeric OH stretch (3454-3211 cm -1 ) in the three samples. The samples contained residual lignin indicated by IR absorption bands at 1592 and 1525 cm -1 . The presence of C=O stretching vibrations of acetyl groups at 1734 cm -1 indicated that African rosewood was generally an acetylated molecule. Each heteropolysaccharide also contained reducing monosaccharides at their ends suggested by the C-H stretching vibrations. Infrared absorptions characteristic of asymmetric β-1,6-glycosidic stretching was present in Beechwood and Agbawood, respectively, and African rosewood gave three absorption bands β-1,3-glycosidic stretch, β-1,4-glycosidic stretch and an asymmetric β 1,6-glycosidic stretch, respectively. Agbawood gave a major absorption band at 923.75 cm -1 corresponding to the absorption band at β-1,4-glycosidic stretching. African rosewood contained 96% mannose and 4% of an unidentified sugar. Beechwood contained primarily glucose, but Agbawood contained 20, 14, 8 and 57% glucose, mannose, galactose, and an unidentified sugar, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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