Abstract
Determination of carbon in steels has been run using a commercial fluorescent X-ray instrument with Rh target tube. The experiments have been revealed that only Rh L spectra in the primary X-rays from the tube OEG-75H excite the carbon and the metallugraphic states of the samples exert a greater influence on the intensities of CK fluorescent X-rays from the samples than the chemical shift does. The investigation result provides practically useful data for carbon determination in cast irons. The typical repeatability (σ) was 0.025% at 3.12% concentration.
