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首页> 外文会议>International Symposium on Supercritical Fluids Tome 1: Natural Products, Process amp; Equipment Development; 20030428-20030430; Versailles; FR >SUPERCRITICAL EXTRACTION OF INDOLE ALKALOIDS FROM Tabernaemontana catharinensis: AN EVALUATION OF THE COSOLVENT ON THE EXTRACT COMPOSITIONS
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SUPERCRITICAL EXTRACTION OF INDOLE ALKALOIDS FROM Tabernaemontana catharinensis: AN EVALUATION OF THE COSOLVENT ON THE EXTRACT COMPOSITIONS

机译：超临界萃取中华Tab吲哚碱的研究-提取物组成上溶剂的评价。

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摘要

Tabernaemontana catharinensis is a tree rich in indole alkaloids, such as coronaridine and voacangine that have antileishmanial activity. SFE from T.catharinensis using CO_2 + 5.1% (m/m) of cosolvent (ethanol, isopropyl alcohol, methanol, water and their mixtures) was studied. The global yields and the compositions of extracts were determined. The data were taken at 250 bar, 45℃, and total solvent flow rate of 6.1 x 10~(-5) kg/s. The crude extracts were fractionated to obtain the alkaloid-rich fractions. These fractions were analyzed by Thin-layer Chromatography. Gas-chromatography/Flame Ionization Detector was used to quantify the voacangine. The average global yield was approximately constant (2.4+-0.1%) for the alcoholic cosolvents; the global yield was significantly larger (15+-1%) for the cosolvent water and its mixture alcoholic mixtures. Nonetheless, the content of alkaloids in the extracts was strongly affected by the cosolvent, the methanol showed to be the more effective cosolvent.
机译：Tabernaemontana catharinensis是一棵富含吲哚生物碱的树，例如可乐宁和伏牛精，具有抗疟疾活性。研究了来自T.catharinensis的SFE，使用CO_2 + 5.1％（m / m）的助溶剂（乙醇，异丙醇，甲醇，水及其混合物）。确定了总产量和提取物的组成。数据是在250 bar，45℃和6.1 x 10〜（-5）kg / s的总溶剂流速下获得的。将粗提取物分级分离以获得富含生物碱的级分。这些级分通过薄层色谱法分析。气相色谱/火焰电离检测器用于量化伏安果碱。含醇助溶剂的平均全球总收率大致恒定（2.4±0.1％）；对于助溶剂水及其混合物酒精混合物，全球收率明显更高（15 + -1％）。但是，提取物中生物碱的含量受到助溶剂的强烈影响，甲醇是最有效的助溶剂。

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