Development of New Ultraviolet Fluorescence Spectroscopy After Combustion for Precise Determination of Trace Sulfur in Steel

Abstract

We have developed an analytical method which enables highly precise and rapid quantitative analysis of ultra low sulfur contained in steel sample. The developed method is “ultraviolet fluorescence method after combustion”, which combined high frequency induction furnace and the continuous UV fluorescence analyzer of sulfur dioxide. Despite easy operation like the conventional IR method, the newly developed method showed high sensitivity and good precision. The quantitation limit of sulfur in steel was 0.5 mass ppm. In addition, it was shown that this equipment has sufficient stability as a process control analysis apparatus of the iron mill which continues operation without resting.