石蓮茶包浸泡液抗氧化功效探討

Antioxidative Activities of Various Water Extracts of Shi-lan (Graptopetalum Paragnayens) Tea Bag

楊景雍(Jing-Iong Yang) ； 蕭玉田(Yu-Tein Hsiao)

《高雄海洋科大學報》 19期 (2004/12) Pp. 23-38

https://doi.org/10.6983/KHHYKTHP.200412.0023

摘要

由於易保存與方便使用，石蓮茶包產品在市面已有一定數量的市場需求。本實驗探討石蓮新鮮葉體經熱風乾燥或冷凍乾燥後製成粉體，其冷水、熱水萃取液，共4種樣品其抗氧化活性的變化，藉以瞭解乾燥方式與浸泡方法對石蓮抗氧化活性間之差異，以作為浸漬茶包加工時的參考。本研究結果顯示，熱風乾燥及冷凍乾燥之各式萃取液中其總酚及類黃酮含量差異不大，且兩者在DPPH自由基清除能力、還原力、清除超氧陰離子能力、及亞鐵離子螫合能力表現類似。此外由實驗數據分析發現，還原力與試樣中總酚含量相關性最高，而DPPH自由基清除能力與總酚含量的相關性最低，推測石蓮的DPPH自由基清除能力可能與總酚之外的物質相互影響。並建議如以經濟與抗氧化性需求考量，建議石蓮可用較經濟的40℃熱風乾燥72小時，取代用高成本冷凍乾燥製作石蓮乾燥茶包。

關鍵字

石蓮 ； 抗氧化 ； 總酚 ； 類黃酮

並列摘要

Due to their long-term storage and convenience, products of Shi-lan (Graptopetalum Paraguayens) tea bags have been demanded for the market. This research studied the antioxidative activities of water extracts of dried Shi-lan which were processed by freeze drying or hot air drying. Antioxidative activities of hot or cool water-extracted solutions of dried shi-lan were investigated in order to understand which exhibited the best antioxidative activities. The results indicated that there was no obvious antioxidative activity differences between the hot-air dried and the freeze dried shi-lan. In view of lower cost and antioxidative preservation, the dried shi-lan powder may be produced by hot air drying under 40℃ for 72 hours.

並列關鍵字

Graptopetalum Paraguayens ； antioxidative activity ； total polyphenol ； Flavonoids