Z本研究探究香椿(Toona sinensis (A. Juss.) Roem.)嫩葉酚類化合物分析條件。以50 mL溶劑一次萃取時，0.25公克溶質萃取量最高，萃取量與溶質重之迴歸方程式為 y=12.6299+(1.4605/x), R2=0.9429, p<0.0001。在 60°C下，以五種甲醇水溶液，即 20%、40%、 60%、80%、100%萃取，萃取所得總酚含量之與甲醇濃度間呈現極顯著之二次迴歸關係， 迴歸方程式 y=-0.0097(x-69.35)2+38.7, R2=0.9327, P<0.001，顯示在 69.35%的甲醇濃度下會 有最大的萃取率38.7 mg/g , 60-80%間幾無差異。再進一步比較乾燥方法、萃取液成分與 萃取條件對香椿葉片總酚類物質萃取量的影響。以真空冷凍乾燥、60%甲醇、萃取60分 鐘可以獲得最高總酚類物質萃取量;但在60%甲醇萃取下萃取時間間差亦不顯著。因此， 同時考慮對環境之衝撃，香椿嫩葉之酚類化合物萃取條件定為，0.25公克冷凍乾燥樣品， 以50 mL之60%甲醇水溶液，在60C水浴下，萃取60分鐘。

This paper investigated total phenolic compounds extraction conditions of Toonasinensis (A. Juss. ) Roem. leaf. Under once extraction by fifty mL solvent condition, extraction rate was high significant related to solvent/solute ratio, the regression formula was y=12.6299+(1.4605/x), R2=0.9429, p<0.0001, and 0.25 g solute had the best solute weight. Fine methanol content water solvent, that was 20%, 40%, 60%, 80% and 100% methanol, were used under 60 〇C condition, extraction rate was high significant related by a quadratic regression model, the formula was y=-0.0097(x-69.35)2+38.7, R2=0.9327, P<0.001, the theoretical highest extraction rate was under 69.35% methanol, but there had no significant difference between 60-80 % methanol. Comparison among three drying methods, the results shown that, freeze dry was the best, especially under 60 % methanol solvent in 60 〇C for 30 minutes. The proper extraction condition should used 0.25 g freeze dry sample with 50 mL 60% methanol, and extracted for 30 minutes under 60〇C condition.