抄録
For the rapid and precise sorting of steel scrap, laser-induced breakdown spectroscopy (LIBS) is a
promising method. It has several advantages such that it can work under ambient air atmospheres, and
specimens can be tested without any pretreatment, such as acid digestion, polishing of the surface of the
specimens, etc. For the application of LIBS for actual steel scrap, we obtained emission spectra by an
LIBS system, which was mainly comprised of an Nd:YAG laser, an Echelle-type spectrometer, and an
ICCD detector. Considering spectral interferences from the emission lines of the iron matrix in the
alloys, Cu I lines having wavelengths of 324.754 and 327.396 nm could be chosen. In five replicate
measurements of each SRM, shorter delay times after laser irradiation and longer gate widths for
detecting the transient emission signal are suggested to be the optimal experiment parameters.
