细叶楠木材的挥发性成分对比分析

【目的】通过对细叶楠与其同属树种及相近树种的木材挥发性化学成分的对比分析,归纳总结出这些木材之间的区别。【方法】通过固相微萃取取样方法和GC-MS分析技术对木材挥发性成分进行分析。【结果】不同地区细叶楠木材挥发性成分的总离子流图相似度高,对应峰的保留时间基本一致,相关系数高,显著性较大。细叶楠木材的挥发性成分主要为多种萜类化合物,且均含有3,7-愈创木二烯、α-紫穗槐烯、δ-荜澄茄烯、十四醛、榄香醇、愈创蓝油烃和7-乙酰基-2-羟基-2-甲基-5-异丙基二环4,3,0]壬烷等7种特征化合物。细叶楠与其同属树种、相近树种的木材挥发性成分有较大差异,可以此作为区分细叶楠木材与其他树种木材的参考依据。【结论】细叶楠木材挥发性成分的GC-MS分析可用来作为识别木种的一种新方法,但要求必须包含7种特征化合物,且保留时间基本相同,相关系数必须大于0.750。

A comparative analysis of volatile components of Phoebe hui Cheng ex Yang

【Objective】Through the analysis and comparison of the volatile chemical constituents of the Phoebe hui Cheng ex Yang and Lauraceae Phoebe Nees and similar tree species, the difference among these wood species was summed up.【Method】The method of solid phase microextraction and GC-MS analysis were used to analyse the volatile chemical constituents of wood.【Result】The total ion flow graphs and corresponding peak retention time of volatile components of the Phoebe hui Cheng ex Yang wood in different districts are basically the same, and the correlation coefficient of relative peak area is large and significant. The volatile components of the Phoebe hui Cheng ex Yang wood are mainly terpenoids and all of them were found to contain the following seven characteristic compounds: 3,7-guaiadiene, α-amorphene, δ-cadinene, tetradecanal, elemol, guaiazolene and 7-acetyl-2-hydroxy-2-methyl-5-isopropylbicyclo4,3,0]nonane. Compared with Lauraceae Phoebe Nees and similar tree species, the volatile components of Phoebe hui Cheng ex Yang are significantly different, this feature can be used as an reference frame to distinguish the Phoebe hui Cheng ex Yang wood from others.【Conclusion】The GC-MS analysis of volatile components of the Phoebe hui Cheng ex Yang wood can be used as a new method for identifying wood species. However, the requirement must include seven characteristic compounds, the retention time is basically the same, and the correlation coefficient must be greater than 0.750.