萜類化合物與古植物學鑑定印尼及多明尼加之化石樹脂植物來源

Terpenoid Compositions and Botanical Origins of Fossil Resin from Indonesia and Dominican

張世正(Shih-Cheng Chang) ； 張英如(Ying-Ju Chang)

《國立臺灣博物館學刊》 73卷1期 (2020/03) Pp. 17-26

https://doi.org/10.6532/JNTM.202003_73(1).02

摘要

化石樹脂是古代植物之分泌物，經掩埋、溫度與壓力作用下所形成的脂狀物，其中萜類化合物組成記錄著植物來源之訊息，故可藉由有機地球化學分析方式，探討其植物來源。本研究利用氣相層析質譜儀（Gas chromatography-mass spectrometry；GC-MS）分析印尼、多明尼加東區與北區化石樹脂之萜類化合物化學組成。初步結果顯示，印尼的化石樹脂成分含有倍半萜類的cadelene以及三萜類的α-amyrin、β-amyrone，由於缺少二萜類成分，故可推論本研究之印尼化石樹脂其植物來源可能為被子植物中的朧腦香科。多明尼加的化石樹脂均含有isopimarate以及methyl sandaracopimarate，並指示著東區與北區兩地化石樹脂之植物來源關係相近。此外，為進一步探討化石樹脂在深埋過程中之化學成份變化，本研究利用熱裂解氣相層析質譜儀模擬化石樹脂在地層中受溫度作用之裂解情況，初步結果顯示，多明尼加化石樹脂成份在300℃與400℃有明顯的變化，推測在此溫度下，化石樹脂之熱裂解反應較活躍，有較多大分子被熱裂解成小分子化合物。本研究證實利用萜類化合物能作為化石樹脂之來源鑑定。

關鍵字

化石樹脂 ； 生物指標 ； 萜類化合物 ； 氣相層析質譜儀 ； 熱裂解氣相層析質譜儀

並列摘要

Fossil resin is a secretion of ancient plants formed by burial, high temperature and pressure. The composition of terpenoids records the information of plant origin, which can be explored by organic geochemical analysis. In this study, gas chromatography-mass spectrometry (GC-MS) was used to analyze the chemical composition of terpenoids of fossil resins in Indonesia, eastern Dominican, and northern Dominican. The preliminary results show that the fossil resin component of Indonesia contains cadelene type sesquiterpenoids and α-amyrin and β-amyrone type triterpenoids, but it lacks diterpenoid components. The source of Indonesian fossil resin may be angiosperm of Dipterocarpceae in this study. Both fossil resins from Dominican contain isopimarate and methyl sandaracopimarate. It indicating that plant sources of the two places are similar. In addition, in order to further explore the changes in chemical composition of fossil resins during burial, pyrolysis gas chromatography mass spectrometry (PY-GC-MS) was used to simulate the pyrolysis of fossil resins in the formation under temperature in this study. The preliminary results show that the fossil resins from Dominican composition have obvious changes between 300℃and 400℃, which can be speculated that fossil resins have great pyrolysis activity. The terpenoid compound is amenable to molecular biomarker analyses in botanical origins or geological applications.

並列關鍵字

Fossil resins ； Biomarkers ； Terpenoid ； GC-MS ； PY-GC-MS

參考文獻

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