Ⅰ.引言在质谱分析的起先,分子由中性状态转变到电离状态。这种过程称为分子电离。使分子电离的各种技术能按如下方法来实现。1. 电子轰击技术,发展很快,其应用范围非常广泛。2. 光子轰击技术,最近才发展起来的,需要复杂的设备,对它的利用在将来也许会有所增长。3. 场致电离技术,是过去十年发展起来 I. INTRODUCTION At the beginning of mass spectrometry, molecules change from a neutral state to an ionized state. This process is called molecular ionization. Various techniques to ionize molecules can be achieved as follows. 1. Electronic bombardment technology, developed rapidly, its scope of application is very wide. 2. Photon bombardment technology, which has only recently developed, requires sophisticated equipment and its utilization may increase in the future. 3. Field ionization technology, developed over the past decade