Quantitative Analysis of Additives in Solid Zinc Alloys by Laser-induced Plasma Spectrometry†

In this paper the use of laser-induced plasma spectrometry has been shown to occur in reduced-pressure laser-induced plasmas from brass (Cu–Zn) samples, the vapour pressures of (LIPS) for the quantitative analysis of Al, Cu, Fe, Pb and Sn components in solid zinc alloys is evaluated. Laser-induced Cu and Zn being di erent by several orders of magnitude.6 As a result, when using internal standardization, a longer time is plasmas are characterized using spectroscopic diagnostic techniques that yield the excitation temperature and electron needed after the laser pulse to attain a constant line intensity ratio (e.g., IZn5ICu ).6 However, such a phenomenon has never density. Optimal experimental conditions for analysis are evaluated, including time gating parameters and distance from been observed in the denser plasmas obtained at atmospheric pressure, such as those studied here. focusing lens to target where it is found that the focus of the laser beam should be positioned behind the target in order to Analysis of aluminium impurities in zinc alloys using LIPS has been reported recently by Kim et al.7 A Nd5YAG laser prevent secondary air plasmas from forming in front of the target. Calibration curves are produced for several analytical (1064 nm) was used to initiate the plasma and the light detection was resolved spatially and temporally. Di erent gas lines, and the analytical performance of the technique is assessed. While low detection limits (<60 ppm) are found, the environments (air and argon at di erent pressures) were investigated. They found that the ratio of the Al I 308.22 nm line to precision of measurement could be improved. the Zn I 307.59 nm line is the best for building calibration