麻黄碱在受热时可挥发,在蒸除提取溶剂时相随挥发损失,不能用常规的提取重量法测定。使用本室新近研制的涂圈压电传感器作为超微量质量敏感元件,取常规提取重量法的基本原理,并加以改进,可以实现麻黄碱的快速分析,从而扩大该经典方法的应用范围。本法可测定低至亚μg级的麻黄碱,具有方法简便、灵敏度高等优点。 Ephedrine is volatile when heated, evaporates with the exception of volatile solvents, and can not be measured by conventional extraction gravimetric methods. The use of the newly developed piezo-piezoresistive sensor in our laboratory as an ultra-micro-mass sensitive element, taking the basic principle of conventional weight-extraction method and improving it, enables the rapid analysis of ephedrine to expand the scope of application of this classical method. This method can be measured as low as micrograms of ephedrine, with the advantages of simple method, high sensitivity.