本研究探討廣藿香 (Pogostemon chablin) 之揮發性成分，廣藿香粉末利用水蒸氣蒸餾-溶劑萃取法及超臨界二氧化碳萃取法萃取揮發性成分，並分析其化學組成及檢測揮發性成分與廣藿香不同溶劑萃取物之抗氧化性。結果顯示，廣藿香揮發性萃取物經GC及GC-MS分離鑑定，共鑑定出19種化合物，其中醇類六種，萜烯類十種，酯類一種、酸類一種及一種酚型化合物。各種萃取物抗氧化性利用硫氰酸鐵法檢測，其強弱依序為BHA＞甲醇萃取物＞α-生育醇＞乙酸乙酯萃取物＞ 正己烷萃取物＞超臨界二氧化碳萃取物＞水蒸氣蒸餾-溶劑萃取物＞控制組。

The purpose of this study was to investigate volatile components of Pogostemon chablin. The volatile extract was obtained from P. chablin by Likens-Nickerson extraction and supercritical carbon dioxide extraction. Components were separated and identified by gas chromatography (GC) and gas chromatographymass spectrometry (GC-MS). 19 components were identified from of the volatile extract, including 6 alcohols, 10 terpenes, 1 ester, 1 acid and 1 phenolic compound. The antioxidant activity of the volatile extract and extracts obtained by various solvent were analyzed by the ferric thiocyanate method. The order of antioxidant activity was: BHA > methanol extract > α-tocopherol > volatile extracts > ethyl acetate extract > n-hexane > supercritical carbon dioxide extract > Likens-Nickerson extraction > control.