论文摘要
灵芝(Ganoderma)一直以来就是一种珍贵且疗效显著的中药材,而灵芝三萜是灵芝中一大类具有生物活性及药用活性的化合物。本实验对灵芝三萜的微波提取技术、灵芝中微量元素的测定、高效液相指纹图谱的建立及应用以及利用逆流色谱分离灵芝三萜的色谱条件进行了一定的研究,结果如下:1)通过ICP-AES法研究了灵芝中的微量元素的种类及含量。微量元素的含量差异存在于在各个样品之间,而且没有很强的规律性,很难进行统一的归纳。2)赤灵芝中三萜类化合物的液相色谱洗脱条件:流动相A乙腈,B水+1%乙酸(0-5 min A 10-15%,5-10 min A 15-30%,10-15 min A 30-40%,15-20 min A 40-45%,20-30 min A 45%-50%,30-40 min A 50%)。流速1 mL/min,检测波长254 nm,进样量:10μL,Waters C18柱。并运用中药色谱指纹图谱相似度评价体系对十种不同地区的赤灵芝样品进行三萜色图谱分析,建立了赤灵芝对照指纹图谱,此图谱对赤灵芝具有一定的代表性。分析其他品种的灵芝后,可知不同品种灵芝之间三萜色谱图具有显著的差异性。3)建立最佳的微波提取灵芝三萜的条件:提取温度75℃、功率870 w、液料比33 mL/g、提取时间17 min。微波提取灵芝三萜类化合物的平均得率达1.043%。4)建立逆流色谱条件初步分离灵芝三萜,其色谱条件为:正己烷:乙酸乙酯:甲醇:水=12:24:16:9(v/v),上相为固定相,转速850 rmp/min,流动相流速为1.2 mL/min。结合制备液相分离得到两种灵芝化合物,纯度分别为87.24%与91.46%。通过液质联用分析这两种化合物的分子量为474,458。通过对比以往的文献可知化合物Ⅰ可能为Lucidenic aid B和Lucidenic acid E1,化合物Ⅱ可能为Lucidenic acid A。
论文目录
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