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一、前言质谱也是一种测定结构的新方法,过去在石油化学方面用得较多,对象较简单,50年代之后才在有机化学中普遍应用,60年代开始在天然有机化学中应用,美国的斯坦福大学Djerasi教授及他的研究小组,研究了一系列有机化合物质谱的规律,此后应用越来越多,仪器和方法不断改进,应用又随之得到发展。电子轰击(EI)是最基本的离子化方法,现在还在使用,可以调整电压以得不同的分
First, the foreword Mass spectrometry is also a new method of determining the structure, the past in the petrochemical use more, the object is relatively simple, 50 years after the general application of organic chemistry, the 60’s began to be used in natural organic chemistry, the United States Professor Djerasi of Stanford University and his team studied the laws of a series of mass spectra of organic compounds. Since then, more and more applications, instruments and methods have been continuously developed and applications have been developed. Electron impact (EI) is the most basic ionization method, is still in use, you can adjust the voltage to get different points