Steel analysis by atomic emission spectrometry using a two-jet arc plasmatron with spark ablation

Abstract

The analytical capabilities of the atomic emission spectrometry method with a two-jet arc plasmatron (TJP-OES) using spark ablation are estimated. The influence of the frequency and duration of the discharge impulse, as well as the operating parameters of the plasma torch on the value of the analytical signal and standard deviation, has been studied. The dependences of the analytical signal on the duration of the spark discharge were obtained, and the optimal sparking time to obtain a stable signal has been found. The detection limits of Cr, Cu, Mn, Mo, Ni, Si, and V during the TJP-OES analysis of steel with spark ablation are in the range of n × 10⁻⁵ ÷ n × 10⁻³ wt%.