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1、不同温度乾燥洛神葵挥发性成 分之萃取,监定与分析不同温度乾燥洛神葵挥装性成分之萃取，定典分析Extraction, IdentiHcation and Analysis of the VolitileComponents in Roselle Dried by Different Temperature研究生：竦世煌Chen, Shyh-Hung指拳教授：蔡碧仁Pi-Jen Tsai【摘要】洛神葵tMt.的虹色保以花青素悬主，然其色素很不稳定，容易失去整果,的虹色，故一般学者 封洛神葵的研究，多以色泽悬探对重融。但是封於洛神葵特殊凰味或撵短桂痔w的相板告刖不 多见。只有Jirovetz等（19
2、92）曾封洛神葵楂子油脂中的挥赞性成分物作遇修定分析。由於洛神葵 在造行加工或热凤乾燥畸，能散会出淡郁的香味，郤在洛真操u装品中缺乏禅特的香氯。因此若 能殁法萃取出其主要挥赞性成分加以修定，她找出具代表性之挥会性成分，未来再校法合成或耨 戮、回添，餐有助於其商品值的提升。在不同温度（25冷黑、50、75及85熟瓜）乾燥之 乾燥洛神葵，以蒸氯蒸偏溶剜萃取（LN装置）及短隹热脱附系*MTD.3装置）萃取其撑登性成分，再 以GC及GC-MS分析定。结果L-N萃取方式筏定出37倜成分，TD-3萃取方式刖可修定出43 佃成分，it依其来源可大致分焉脂肪酸衍生物、糖颊衍生物、酚颊衍生物、terpene化合
3、物等四大 颊。其中脂肪酸衍生物以直键六碳之醛、醇卷主，糖版衍生物以furfural卷主，酚颊衍生物以丁香 酚焉主 terpene 化合物以 linalool limonene linalool oxide 及q-terpineol 卷主。在直铤六碳酸、 醇颊及terpene化合物中的linalool及limonene等成分 以TD-3萃取方式所得理:酸性成分比例较 L-N 方式高；而 furfural 及其他 terpene 数如 linalool oxide、a -terpineol 及 eugenol 等则以 L-N 萃取方式所得之成分比例比TD-3萃取方式悬高。在比敕不同温度乾燥的洛神葵
4、挥援性成分，脂肪 酸衍生物方面，未乾燥之洛神葵槛品其含量高於乾燥洛神葵掾品；furfural的含量以乾燥洛神葵中 含量较高於，it且fit著檬品乾燥温度之提升furfural的含量也之增加。而terpene颊中的linalool 及limonene刖陵乾燥温度的上升而减少。酚颊衍生物的丁香酚在不同温度乾燥之洛神葵椽品及未 乾燥洛神葵椽品中其含量攵有太大之具。造些康定出之群登性成分，畿主成分分析法分析，其 结果在L-N萃取方式部分 第一主成分正相悬terpene S（成分卷主，负相悬furfural及 5-methyl-2-furaldehyde ；第二主成分正相部分卷linalool及octa
5、nal等成分，负相即】卷hexanol成 分。TD-3萃取方式部分 第一主成分正相以terpene嫉卷主负相悬furfural ；第二主成分正相刖 是以limonene -linalool及hexanal等成分悬主，而第一、二主成分之负相交集部分费 1分伟有furfural。IW维字：洛神葵 挥装性成分 熬脱附主成分分析 主成分AbstractJLiken-Nickerson steam distillation (L-N) and short path thermal desorption system (TD-3) were used to extract the volatiles of
6、 roselie dried by different temperature, including cold-air dried (25)and hot-air dried (50(, 75and 85) Volatiles were analyzed and identified by GC and GC-MS. At least 37 and 43 compounds were characterized by L-N and TD-3 methods, respectively and were classified into four groups: fatty acid deriv
7、atives, sugar derivatives, phenolic derivatives and terpene components. As compared with L-N extraction, volatiles extracted by TD-3 apparently had more quantity in compounds of the aliphatic C6 components (hexanal, (E)-2-hexenal etc.) and terpene (especially in linalool and limonene). But thermal g
8、enerated volatile such as furfural, tei-pene derivatives(linalool oxide, a-terpineol) and eugenol, has much less amount in comparison. Volatiles gave different tendency in the samples dried by different temperature. In the undried sample, the quantity of fatty acid derivatives were much higher when
9、compared with the dried ones. Furfural (sugar derivatives) increased with increasing drying temperature, while linalool and limonene (terpene components) decreased. No obvious change in eugenol (phenolic derivatives) from all samples was found. All the volatiles were further analyzed by principal co
10、mponent analysis (PCA) to elucidate the causative compound of the volatiles in roselie. Along the positive and negative directions of the factor 1 axis were terpene and sugar derivatives (furfural), respectively. Therefore, roselle volatile might come from a combination of volatiles mainly with terpene and sugar derivatives.Keywords: roselle , volatile component, thermal desorption , principal component analysis (PCA), principal component regression (PCR)
