Analysis of metals in liquid by laser-induced breakdown spectroscopy

This paper reports quantitative and qualitative analysis of metals in the liquid by laser-induced breakdown spectroscopy. The two measurement modes, liquid jets (diameter of 0.5 mm) and static liquids, have been used in experiments. The calibration curves of Cd, Pb, Fe and Al elements with different concentrations in the liquid were acquired, and the linear correlation coefficients of the calibration curves are basically higher than 0.99. The detection limits of metals are 0.206 5(Cd), 0.147 6(Fe), 0.061 9(Al) and 0.200 9(Pb) g/L at the liquid jets mode and 0.050 1(Cd), 0.023 9(Fe), 0.014 8(Al) and 0.006 9(Pb) g/L at the static liquids mode. The experiment results provide the basis for the detection of metallic elements in the industrial waste water．