Abstract: Treemoss concrete was extracted with molecular distillation (MD) and simultaneous distillation extraction (SDE), and the extracts were analyzed by GC/MS. About 85 and 61 chemical components were extracted by SDE method and molecular distillation method, respectively. The terpenoid by two methods were significantly different. The variety of terpenoid by SDE was more than MD, whereas the major chemical components extracted by the two methods were the same. Among these chemical components, some had the higher concentration (above 76%) and they were identified as 3-methoxy-5-methylphenol, divarinol monomethyl ether, ethyl everninate, methyl divaricatinate, benzoic acid,2,4-dihydroxy-3,6-dimethyl-, methyl ester, ethyl hematommate, ethyl 2,4-dihydroxy-6-methylbenzoate, ethyl divaricatinate, ethyl palmitate, ethyl oleate, linolenic acid ethyl ester, linoleic acid ethyl ester and so on. These chemicals are the key components in the treemoss which can provide the special fragrance character of treemoss concrete. And these components are enriched well in the heavy fraction of the molecular distillation.

Key words: treemoss concrete, molecular distillation, simultaneous distillation extraction, chemical constituents