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为了研究降香黄檀与越南香枝木材中的化学成分,采用顶空/气质联用法测定了降香黄檀与越南香枝可挥发性成分与脂溶性成分,通过对指纹图谱的对比分析,得出一种可以准确区分两种材质的鉴别方法。结果表明:在可挥发性成分测定中,顶空进样器平衡温度是影响可挥发性成分检出种类及量的主要因素之一,可挥发性成分检出种类及量随平衡温度增高而增加;两材种可挥发性成分较多,均达30种以上,且种类相似,虽含量有差别但不足以构成其特征性差异,无法将两材种加以区分。在脂溶性成分测定中,乙酸乙酯是提取两材种脂溶性成分的最佳试剂,石油醚提取效果较差,甲醇提取液对检测系统污染程度较高;两材种脂溶性成分丰富、相同成分众多,且差异性成分也多。两材种均含大量的橙花叔醇、反式-橙花叔醇和6,7-环氧-蛇麻烯等3种脂溶性成分,三者之和均可达脂溶性成分总量的40%以上。越南香枝中有5种含量较高的脂溶性成分即3,3′,4,4′-四甲氧基二苯乙烯、松属素、3-(2,4-二甲氧基苯基)-7-甲氧基苯并二氢吡喃、3,4-二氢-7-甲氧基-3-(2,3,4-三甲氧基苯基)-2H-1-苯并吡喃、N-[2-(3,4-二甲氧基苯基)乙基]-3-甲氧基-苯甲酰胺,这5种脂溶性成分在越南香枝中含量之和占总脂溶性成分的20%~40%,而在降香黄檀中不足1%,由此可将两材种进行有效鉴别和区分。分析认为,降香黄檀与越南香枝两材种的化学成分差异显著,其中可挥发性成分差异不明显,无法以此准确区分材种,而脂溶性成分种类及含量差异显著,可准确区分两材种。
In order to study the chemical constituents of Dalbergia xylostella and V. fragrans, the volatile components and fat-soluble components of Dalbergia xylostella and V. yunnanensis were determined by headspace / GC-MS. By comparing the fingerprints, A method of distinguishing two materials accurately. The results showed that in the determination of volatile components, the equilibrium temperature of headspace sampler is one of the main factors that affect the types and amounts of volatile components detected. The types and amounts of volatile components detected increase with the increase of equilibrium temperature ; The two varieties of volatile components are more, reached more than 30 species, and the types are similar, although the content is different but not enough to form its characteristic differences, can not be distinguished between the two species. In the determination of fat-soluble components, ethyl acetate is the best reagent to extract the two kinds of fat-soluble components, the extraction efficiency of petroleum ether is poor, and the methanol extract has a higher degree of pollution to the detection system. The two materials are rich in fat-soluble components, Many components, and differences in the composition of many. Both species contain a large amount of three kinds of fat-soluble constituents, including nerolidol, trans-nerolidol and 6,7-epoxy-menthene, and the sum of the three can reach 40 %the above. There are five kinds of high content fat-soluble components in Vietnam, namely 3,3 ’, 4,4’-tetramethoxy stilbene, pine, 3- (2,4-dimethoxyphenyl) Methoxychroman, 3,4-dihydro-7-methoxy-3- (2,3,4-trimethoxyphenyl) -2H-1-benzopyran , N- [2- (3,4-dimethoxyphenyl) ethyl] -3-methoxy-benzamide, the five kinds of fat-soluble ingredients in the total content of the fragrant branches in Vietnam, the total fat-soluble components Of the 20% ~ 40%, while in the descent rosewood less than 1%, which can be two species of effective identification and distinction. The results showed that there were significant differences in the chemical constituents between the two species of Dalbergia sidoi and the two species of Amaryllis sibirica. The difference of volatile components was not significant, so the species could not be distinguished accurately. The species and content of liposoluble components were significantly different, Species.