Document Type : Research Paper
Author
Department of Wood and Paper Science and Technology, Cha. C., Islamic Azad University, Chalus, Iran; mjd_kia59@yahoo.com; mjd_kia59@iau.ac.ir
Abstract
Abstract:
Background and objective: This study aimed to extract, identify, and compare the chemical compounds in acetone-soluble extracts from the bark and wood of Populus alba using gas chromatography–mass spectrometry (GC-MS).
Materials and Methods: Three healthy trees were selected from the Marzanabad region. After preparing disks at breast height, bark and wood samples were separately collected and milled into powder. Organic compounds were extracted according to the TAPPI standard method using a Soxhlet apparatus. After derivatization of the compounds with the BSTFA reagent, the samples were injected into the GC–MS instrument. Identification of compounds was performed based on retention time, calculation of the Kovats retention index, and comparison of mass spectra with the device’s library and Adams’ table.
Results: Results showed that the percentage of acetone soluble extractives in poplar bark was considerably higher than in its wood. In total, 17 chemical compounds in bark and 18 compounds in wood were identified. p-Xylene was found to be the predominant compound in both parts, accounting for over 36% of total extractives, with its content being significantly higher in bark than in wood. Additionally, compounds such as ethylbenzene, 1,2 dimethylbenzene, limonene isomers, aliphatic hydrocarbons, and certain fatty acids were commonly identified in both bark and wood, although their relative distribution differed between bark and wood samples.
Conclusions: The superior content and diversity of extractives in poplar bark indicate that this part, despite its currently limited application, can be considered as a potential source of valuable aromatic and organic compounds for use in chemical, wood, and bioprocessing industries.
Keywords: Populus alba, extractives, bark, gas chromatography-mass spectrometry
Abstract:
Background and objective: This study aimed to extract, identify, and compare the chemical compounds in acetone-soluble extracts from the bark and wood of Populus alba using gas chromatography–mass spectrometry (GC-MS).
Materials and Methods: Three healthy trees were selected from the Marzanabad region. After preparing disks at breast height, bark and wood samples were separately collected and milled into powder. Organic compounds were extracted according to the TAPPI standard method using a Soxhlet apparatus. After derivatization of the compounds with the BSTFA reagent, the samples were injected into the GC–MS instrument. Identification of compounds was performed based on retention time, calculation of the Kovats retention index, and comparison of mass spectra with the device’s library and Adams’ table.
Results: Results showed that the percentage of acetone soluble extractives in poplar bark was considerably higher than in its wood. In total, 17 chemical compounds in bark and 18 compounds in wood were identified. p-Xylene was found to be the predominant compound in both parts, accounting for over 36% of total extractives, with its content being significantly higher in bark than in wood. Additionally, compounds such as ethylbenzene, 1,2 dimethylbenzene, limonene isomers, aliphatic hydrocarbons, and certain fatty acids were commonly identified in both bark and wood, although their relative distribution differed between bark and wood samples.
Conclusions: The superior content and diversity of extractives in poplar bark indicate that this part, despite its currently limited application, can be considered as a potential source of valuable aromatic and organic compounds for use in chemical, wood, and bioprocessing industries.
Keywords: Populus alba, extractives, bark, gas chromatography-mass spectrometry
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