Emission Spectrochemical Determination of Boron in Steels with Pulse Height Distribution Analyzer

Abstract

The method for rapid determination of total, acid soluble and insoluble boron was established by using emission spectrochemical apparatus equipped with pulse height distribution analyzer. By using the analyzer, emission intensity can be expressed as different level intensity of pulse height distribution. It was made clear that soluble and insoluble boron had different contribution degree to each intensity and that this contribution degree varied at different pre-spark. Therefore, it is necessary for accurate determination of boron that this contribution degree should be corrected by using two intensities, of which contribution degrees are different. It was found on this two intensities method that total and soluble boron corresponded well to 50% intensities at zero pre-spark and at 2 000 pre-spark and that insoluble boron corresponded well to 70% intensity at zero pre-spark and 50% intensity at 2 000 pre-spark.