Pyrolysis Products from Osmanthus Fragrans Wood
Cheng LiXiaochen YueJun YangYong ZhaoChunxia LvShuaiwei DongXuefeng LuoZhiyong SunYing ZhangBaoxiang LiYafeng YangQiuling ZhangHuitao BiDongfang ZhengWanxi Peng
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Abstract:
Osmanthus fragrans is a widely multi-purpose economic plant in China. However, few study was focus on the utilization of Osmanthus fragrans wood. In this study, the pyrolysis products of Osmanthus fragrans var thunbergii (OFVT) wood were investigated by PY-GC-MS. According the results of PY-GC-MS analysis, there are 185 chemical constituents were identified in 201 peaks of Osmanthus fragrans wood. The results shows that the pyrolysis products of Osmanthus fragrans wood contained many high-value components, such as acetic acid, methyl glyoxal, azetidine, creosol, vanillin, furfural, trans-isoeugenol, and so on, which can be used as a raw materials for chemicals and fuels. The thermal properties of Osmanthus fragrans wood was measurement by thermogravimetric analyzer.Keywords:
Osmanthus fragrans
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The essential oils from two species of osmanthus fragrans had been analyzed qualitatively and quantitatively by gas chromatography-mass spectrometry(GC-MS) with the help of chemometric resolution method(CRM).71 components accounting for 95.49% and 92.28% of the weight of oil samples were identified,respectively.The constituents included α-methyl-α[4-methyl-3-pentenyl]oxiranemethanol,β-linalool,nonanal,syringa-aldehyde,(E)-β-ionone,hexadecanoic acid,methyl salicylate,et al.The results showed that the overlapped peak clusters were resolved into pure chromatograms and pure mass spectra by means of the HELP method,with the accuracy of qualitative and quantitative analyses greatly improved.
Osmanthus fragrans
Nonanal
Methyl salicylate
Ionone
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Abstract To compare the chemical composition of four groups of Osmanthus fragrans Lour., their flowers were collected at the same place and same season. The essential oils were extracted from the fresh flowers by simultaneous distillation extraction (SDE), and the chemical compositions of the essential oils were evaluated by using gas chromatography mass spectrometry (GC-MS) and identified in comparison with authentic compounds coupled with linear retention index (LRI). Totally 51 components were identified. γ-decalactone was the common composition, which content was the highest in Thunbergii, Aurantiacus and Sempeiflorens groups, accounting for 17.71 %, 30.10 %and 19.94 %, respectively. The content of 1,3,5-Trioxepane was the highest in Latifolius group, accounting for 22.69 %. Ketones, alcohols, asters, aldehydes and acids were the major constituents of four different O. fragrans, representing 90.05 %, 95.07 %, 86.76 %and 80.21 % of the essential oil, respectively.
Osmanthus fragrans
Kovats retention index
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Osmanthus fragrans
Ionone
Petroleum ether
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A headspace solid-phase microextraction(HS-SPME) method was used to extract the essential oil of 8 Osmanthus fragrans cultivars from the 4 groups,which were then analyzed by gas chromatography-mass spectrometry(GC-MS) at full flowering stage.In this study,39 volatile compounds were identified in each cultivar of asiaticus group,aurantiacus group and luteus group and 38 volatile compounds were identified in each one of albus group.Nine same components of the essential oil extracted from the 8 cultivars were ocimene,3-carene,cis-linalool oxide,trans-linalool oxide,linalool,nonanal,β-ionone,α-ionone and γ-decalactone.The results suggested that the differences of volatile compounds among O.fragrans cultivars were not obvious.
Osmanthus fragrans
Nonanal
Solid-Phase Microextraction
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[Objective]The aim was to analyze dynamic changes of volatile organic compounds from branche and leaves of Osmanthus fragrans(Thunb.)Lour.[Method]Using living plants bagged dynamic headspace collection and TDS / GC / MS combined technology, volatile organic compunds(VOCs) dynamic variations from branches and leaves of Osmanthus fragrans(Thunb.) Lour were researched by normalization method to determine the relative contents of each chemical composition from May to September in 2009.[Result]The total 64 kinds of compounds were identified and divided into seven types,mainly based on ester compounds,terpenoids and aldehydes,which get 70.82% in the total 64 kinds of identified compounds.3-Hexen-1-ol,acetate,(Z)-,Dihydrocitronellol,Z-Ocimene,Decanal,Nonanal and other chemical constituents were mainly released.[Conclusion]The study provide a reference for the application of Osmanthus fragrans(Thunb.) Lour.in garden.
Osmanthus fragrans
Nonanal
Decanal
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OBJECTIVE To analyze the volatile constituents of the flowers of Osmanthus fragrans.METHODS The essential oil was extracted by steam distillation and analyzed qualitatively by gas chromatography-mass spectrometry(GC-MS).RESULTS 28constituents were detected and 22 of them were identified from the flowers of Osmanthus fragrans.CONCLUSION The volatile constituents are investigated for the first time from the flowers of Osmanthus fragrans.
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Steam distillation
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Objective To characterize the volatiles in picked flowers and leaves of Osmanthus fragrans var. semperflorens, and to understand the volatile composition and content in them. Methods Headspace-solid-phase microextraction and gas chromatography- mass spectroscopy(GC-MS) were used to characterize the volatiles in picked flowers and leaves of Osmanthus fragrans var. semperflorens. Results A total of 23 components in the flowers and 18 in the leaves were identified by matching EI mass spectra and retention indices with the literature data, accounting for 85.73% and 64.58% total content of volatiles in flowers and leaves, respectively. Briefly, ethyl geranate, trans-geraniol, methyl geranate, trans-citral, 2,6,10,10-tetramethyl-1-oxa-spiro[4.5] dec-6-ene, cis-citral and nonanal were the most common volatiles in tested flowers. The major odors found in the leaves were cis-3-hexenyl acetate, 4,11-dimethyl- tetradecane, Methoxyacetic acid, 2-tridecyl ester, benzeneacetaldehyde and phenylethyl alcohol. Conclusion The method of HS-SPME/GC-MS is practical and suitable for the analysis of the volatile of picked flowers and leaves of Osmanthus fragrans var. semperflorens, so as to facilitate the devel-opment of Osmanthus scultivars to meet requirements of the food and fragrance industries.
Osmanthus fragrans
Nonanal
Citral
Ionone
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Objective: To investigate the volatile constituents from 3 species flowers of Osmanthus fragrans Lour.Methods: The volatile constituents from the flowers of O.fragrans Lour.were analyzed by head-space solid microextraction,coupled with HS-SPME GC-MS for the first time.Results: 66 components were identified from the flowers of O.fragrans(Wanyingui),O.fragrans(Guifeihong) and O.fragrans(Yaotiaoshunv),the contents of which were determined respectively by peak area normalization method.The relative contents accounted to 79.96%、71.83% and 83.61% of peak area in the volatile group.Conclusion: The volatile constituents are investigated for the first time from different species,and it provides the basis for further development.
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As the noble gardening tree growing specifically in China, Osmanthus fragrans is widely used to produce high-grade essence, special drugs and aromatic tea form its flowers. However, O. fragrans leaves are still underutilized and hence wasted. Therefore, in order to better utilize O. fragrans leaves and hence to expand its utility values and industrial scopes, we attempted to analyze the bioactive components, especially biomedical constituents from O. fragrans leaf by the way of Py-GC/MS (Pyrolysis- gas chromatograph/ mass spectrometer). After acetone extraction on O. fragrans fresh leaf by ultrasonic extraction for 5 h at 90degC, and with the removal of solvent, the extractive was pyrolyzed in 590degC He atmosphere, then the pyrolysis product was analyzed by online linked GC/MS. Relative content of each component was determined by area normalization, and 64 compounds representing 97.85% of the acetone ultrasonic extractive were identified from 65 peaks (Figure 1). The main constituents were as: friedelan-3-one (38.87%), lup-20(29)-en-3-one (12.46%), Stigmasterol,22,23- dihydro- (6.23%), Urs-12-ene (5.45%), benzoic acid,4-hydroxy-3- methoxy- (2.08%), stigmasterol (1.96%), cyclotetracosane (1.92%), acetone (1.59%), beta-amyrin (1.57%), benzoic acid,4- hydroxy- (1.32%), l,6-anhydro-.beta.-D-glucopyranose (1.32%), toluene,3-(2-cyano-2-phenylethenyl-) (1.22%), taraxasterol (1.20%), 1,2-propanediamine (1.07%), hexadecanoic acid (1.00%), ergosta-4,6,22-trien-3.alpha.-ol (1.00%), 1,2-benzenediol (0.91%), vitamin E (0.90%), campesterol (0.89%), etc. The results of function analyses suggested that the pyrolysis product from the acetone ultrasonic extractive of O. fragrans leaf is abundant in materials of noble natural medicines, and also contains constituents which can be developed into top value- added materials of cosmetics, biofuel and industrial. This is the first report here that showed underutilized leaf of O. fragrans contains abundant biomedical constituents and can be developed into top value-added products.
Stigmasterol
Benzoic acid
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ABSTRACT The headspace of three varieties of Osmanthus fragrans was examined by GC/MS. Fifty-five constituents were characterized.
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