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A new method, non-polar solvent microwave-assisted extraction (NPSMAE),was applied to extraction of essential oils from Foeniculum vulgare Mill.. By adding microwave absorption medium (carbonyl iron powders) into extraction system, the non- polar solvent (ether) was heated by CIP and the essential oil was obtained at high pressure. The constituents of essential oil obtained by NPSMAE was compared with that obtained by hydrodistillation (HD) by GC/MS analysis. The main volatile constituents in extracts obtained by different methods were similar, which indicated that NPSMAE was a feasible way to extract essential oil from dried plant materials. The NPSMAE took much less extraction time (5 min) than HD (180 min). 相似文献
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微波辅助酸消解植物样品的改进 总被引:1,自引:0,他引:1
本文对常压下微波炉消解植物样品用的反应器作了改进,用自制的聚四氟乙烯反应罐取代聚乙烯塑料桶,选择最佳实验条件,使消解的试样量有所增加.以AAS法测定标准参考物质中的Cu、Fe、Mn、Zn、Pb、Cd,结果令人满意. 相似文献
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微波等离子体炬原子发射光谱法测定人发中的六种微量元素 总被引:4,自引:0,他引:4
采用干法消解处理样品、微波等离子体炬(MPT)原子发射光主普法测定了人发中锌、锰、镁、铜、钙和铝等6种重要元素的含量,讨论了实验参数的最佳化。用本法对国家标准物质人发样品(GBW09101)中相应元素的含量也进行了测定,测量结果与推荐值符合较好,回收率在85%-115%之间,精密度均小于3%。本方法具有灵敏度高,样品用量少(<4mL),维持费用低,分析速度快等特点,仅需4min即可完成一个样品中6种元素含量的测定。 相似文献
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将微波等离子体炬原子发射光谱法与电热蒸发进样技术联用,在不加基体改进剂的情况下测定了实际样品中的铅。结果表明ETV-MPT-AES样品消耗量少,灵敏度高,适合于实际样品中痕量铅的测定。 相似文献
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