عنوان مقاله [English]
نویسنده [English]چکیده [English]
A Study on the Possibility of Extraction, Identification and Comparison of the Resins in Wood and Bark of Planted Elder Pine Tree by GC-MS Methods
Background and aim: Elder pine tree is one of the species that planted in city parks, garden and forests region of Tehran and another city of Iran.Eldar pine tree is one of the species that planted in city parks, garden and forests region of Tehran and another city of Iran. Eldar pine tree imported to Iran from Tiflis (Georgia) about 800 years ago, it can be can very effective in ever-green and beautiful of city region. The leaves and bark of this species are important in ions adsorption of air pollutions (Ager and Marshall 2011; Andrady and Searle 1995; Balaban 2001). Eldar pine is soft wood with certain heartwood and gum ducts. The growth-ring boundary is certain. The tracheids walls are thick in end of growth-ring. The rays have across-tracheid and sometimes with gum duct. This study and it aim was accomplished on identification and comparison of organic compounds in wood and bark of planted elder pine tree.
Materials and methods: In this study, three trees from species of planted elder pine tree were randomly cut down in planted forest region of Tehran city. Then from each tree were separated three disks. At first wood flour and then extractive measured by TAPPI standards. Then wood flour was washed by acetone and extractives residue was added BSTFA reactor and samples kept in Ben Marry Bath in 70oC for an hour, and they were analyzed by GC/MS. For the Identification of compounds were used GC diagram which shows abundance and retention time of each compound, and calculation of quartz index and Adams table .
Results: The results of this study showed that the average of extractives in wood and bark of planted elder pine tree were 3.6 and 17 percent, respectively. that the result of GC-MS showed that,, specified 56 compounds were found in wood of eldar pine. The 1-Phenanthrerecarboxylic acid (31.77%), Rosin acids (27.12%), Pimaric acid (2.61%), Gamma-Sitosterol (1.01%) and α-Pinene (0.09%) were more Components. Also, 43 compounds were found in bark of eldar pine that Octadecanoic acid (15.87%), Rosin acids (1.7%), Gamma-Sitosterol (5.6%), Abietic acid (0.78%), and Tetradecan (2.91%) were important Components.
Conclusion: So that, there were Phenanthrenecarboxylic acid,Rosin acids, Gama-Sitosterol, Decanoic acid, Dodecan and Tetradecan as 11 common compounds in wood and bark of planted elder pine tree, and these compounds are very important in durability and consumption its.
Keywords: Elder pine tree, Retention Time, BSTFA, Gas Chromatography, Mass Spectrometry.