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本文论述了用于发射光谱分析的空心阴极光源要使用的氦、氩两种载气各自的优缺点,根据钢铁分析、超纯物质分析的实际工作,同时考虑到降低成本,选定氩气代替氦气。设计了动态平衡式真空系统代替常用的封闭式真空循环系统,简化了装置。研制了可控硅稳流的高压直流电源,能以直流、脉冲和直流加脉冲三种方式供电。编排出简易的程序控制装置。对多数元素,分析的绝对检出限为10~(-6)～10~(-11)g,相对检出限为10~(-3)～10~(-6)%,变差系数为10～50%。
This paper discusses the advantages and disadvantages of the two kinds of helium and argon carrier gases to be used in the hollow cathode light source for emission spectroscopy. According to the actual work of steel analysis and ultrapure material analysis, taking into account the cost reduction, the selected argon gas instead Helium. The design of a dynamic balance of vacuum system instead of the commonly used closed-loop vacuum system, simplifying the device. Developed high-voltage DC power supply of SCR steady flow, which can supply power in DC, pulse and DC plus pulse. Arrange a simple program control device. For most elements, the absolute limit of detection (LOD) was between 10 -6 and 10 11 and the relative detection limit was 10 -3 to 10 -6% 10 ~ 50%.