Emission Spectroscopy — Panel Discussion
Emission spectroscopy has shown a rapid and rather consistent growth in the metal industries since 1930 and until rather recently. This is true of both growth as measured by numbers of determinations made and growth in terms of quality of the data produced. The initial and very rapid adoption of emission spectroscopy during the thirties and early forties was primarily due to inherent advantages over wet chemistry that could be realized with relatively little research and with equipment little advanced over that available for many years. By the end of World War II, the development of spectrochemical analysis in the areas of greatest economic importance to the metal industry was approaching a ceiling imposed by inherent limitations of the photographic process. This ceiling was lifted by the advent of the photo multiplier tube which brought the direct reading instruments into being. These have replaced many spectrographs and will replace most but probably not all such instruments in the metal industry. The so-called direct readers improved analysis directly by reducing errors of measurement and indirectly by enabling investigators to measure variables that had been blurred out by photographic variables. Direct readers led to a further and more drastic supplanting of wet methods by emission methods.
KeywordsEmission Spectroscopy Radioactive Material Metal Industry Direct Reader Great Economic Importance
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