一种简易同时蒸馏萃取方法用于八角茴香挥发油提取及其GC-MS分析

设计了一种简易同时蒸馏萃取(SSDE)装置并用于八角茴香挥发油提取及其气相色谱-质谱法(GC-MS)分析。 该装置由圆底烧瓶、恒压滴液漏斗和回流冷凝管构成。 通过对八角茴香挥发油组分的GC-MS分析,比较SSDE法和水蒸汽蒸馏提取法(HD)提取植物源挥发油的效果。 结果表明,SSDE法所得挥发油相对含量在0.1%以上的19种化合物占挥发油总量的98.84%(相对标准偏差(RSD)(n=3)均不大于5.59%,其中RSD﹤5%的17种化合物占鉴定组分89.5%。SSDE法和HD法挥发油平均收率分别为7.30%(RSD=2.37%(n=5))和6.67%(RSD=5.26%(n=5))。 SSDE法简便、快速,适用于八角茴香挥发油的提取。     

Jiadifenlactone A,a novel diseco-prezizaane-type sesquiterpenoid from the fruits of Illicium jiadifengpi

Jiadifenlactone A (1), the first example of cleavage of bond [4, 9] of the seco-prezizaane-type sesquiterpenoid with a unique 9-membered ring moiety, together with its biosynthetic related compound 2, were isolated from the fruits of Illicium jiadifengpi. The structure of 1 and its relative configuration were determined by spectroscopic methods and single-crystal X-ray diffraction analysis. The inhibitory rates of compound 1 on the HBeAg and HBsAg expressions were 37.91 ± 2.78% and 17.21 ± 3.78%, respectively.     

Microwave extraction of essential oils from dried fruits of Illicium verum Hook. f. and Cuminum cyminum L. using ionic liquid as the microwave absorption medium

Ionic liquid was used as microwave absorption medium and applied to the extraction of essential oils from dried fruits of the Illicium verum Hook. f. and Cuminum cyminum L. by microwave‐assisted extraction. The extraction time is less than 15 min at the microwave power of 440 W. The constituents of essential oils obtained by the proposed method were compared with those obtained by hydrodistillation. There is no obvious difference in the constituents of essential oils obtained by the two methods.