Application of Thoria‐Iridium as the Source of Ionizing Electrons in Mass Spectrometry
Application of Thoria‐Iridium as the Source of Ionizing Electrons in Mass Spectrometry
复制标题
钍铱作为电离电子源在质谱分析中的应用
DOI：
10.1063/1.1716166
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发表时间：
1958
影响因子：
1.6
通讯作者：
C. E. Melton
中科院分区：
文献类型：
--
作者：
C. E. Melton
在氯和甲酸光解产生氯化氢和二氧化碳的质谱研究中，需要10/sup -5/ mm Hg的源压力；因此，仪器遇到的主要困难是用于产生电离电子的钨丝的烧毁。由于氯会发生反应，灯丝必须在每使用八小时后更换一次。讨论了钍铱作为质谱仪中灯丝的用途。该灯丝具有较低的工作温度、耐腐蚀性气体的化学性能、具有恒定的发射特性并且使用寿命长。 （交流）
In mass spectrometric studies of the photolysis of chlorine and formic acid to produce hydrogen chloride and carbon dioxide, a source pressure of 10/sup -5/ mm Hg is required; consequently, the principal instrumental difficulty encountered is burnout of the tungsten filament used to produce ionizing electrons. Due to the reaction of chlorine the filament must be replaced after each eight hours of service. The use of thoria-iridium as a filament in a mass spectrometer is discussed. This filament has a lower operating temperature, is chemically resistant to corrosive gases, has constant emission characteristics, and has a long life. (A.C.)