论文部分内容阅读
微波等离子体是六十年代后期发展起来的一种用于发射光谱分析的新光源。氦微波等离子体光谱法则是迄今为止测定微量和超微量卤族元素、硫、磷等非金属元素最灵敏、最有效的方法,最低检测限一般可达10~(-11)—1O~(-13)克。但由于技术上的原因,常压氦微波等离子体很难获得,以致不得不采用抽真空的办法以得到低压氦微波等离子体,给使用带来了很大的不便,限制了其推广和应用。1976年,Beenakker研制成功了一种可以得到常压氦微波等离子体的微波谐振腔,情况才开始有所改善。但在我国,迄今还没有获
Microwave plasma was developed in the late 1960s as a new light source for emission spectroscopy. Helium microwave plasma spectrometry is by far the most sensitive and effective method for the determination of trace and ultra-trace elements, such as sulfur, phosphorus and other non-metallic elements. The detection limit is generally 10 ~ (-11) -1O ~ (- 13) grams. However, due to technical reasons, it is difficult to obtain the atmospheric helium microwave plasma, so that the vacuum method has to be adopted to obtain the low-pressure helium microwave plasma, which brings great inconvenience to the use and limits its popularization and application. In 1976, Beenakker successfully developed a kind of microwave cavity that can obtain atmospheric helium microwave plasma, and the situation began to improve. But in our country, so far have not been won