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众所周知,对于超微量分析,火花离子源质谱仪是一种最有效的仪器。用于同样目的的其它仪器有发射光谱、原子吸收、X射线微区分析以及活化分析等。除应用于分析某些元素的活化分析外,这些仪器的可探测率都不能与火花离子源质谱仪相匹比,后者对所有元素都能探测到1ppb的数量级。人们曾经认为,要想用火花离子源质谱仪得到更高的可探测率是很困难的。为了得到更高的可探测率,有两个主要问题需要解决。一个是为了进行超微量分析需要很长的探测时间,另一个是本底质谱和
It is well known that spark ion source mass spectrometry is the most effective instrument for ultramicro analysis. Other instruments used for the same purpose have emission spectroscopy, atomic absorption, X-ray microanalysis and activation analysis. Except for activation assays that are used to analyze certain elements, none of these instruments detectably match the spark ion source mass spectrometer, which detects 1 ppb for all elements. It has been thought that it is difficult to get a higher detectable rate with a spark ion source mass spectrometer. In order to get a higher detectable rate, there are two major issues that need to be resolved. One is for ultra-trace analysis that takes a long time to detect and the other is background mass spectrometry and