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为了改善其检测极限和定量分析的线性拟合系数,同时满足实时在线监测的需求,采用气雾化辅助激光诱导击穿光谱技术,对水溶液中钙(Ca),铬(Cr),钾(K),镁(Mg),钠(Na),铅(Pb)六种元素进行了定性和定量检测.通过对离焦量、横向距离、激光能量以及延时4个主要参数的优化,获得上述六种元素的检测极限分别为1.2,3.2,19.1,3.4,2.8和15.9 ppm,其线性拟合系数均达到0.99以上.实验结果表明,气雾化辅助激光诱导击穿光谱技术是一种快速在线检测液体中痕量金属元素的有效方法.
In order to improve the linear fitting coefficient of detection limit and quantitative analysis and meet the demand of real-time on-line monitoring, the gas-assisted laser induced breakdown spectroscopy (FAI) ), Magnesium (Mg), sodium (Na) and lead (Pb) were determined qualitatively and quantitatively.The optimization of four main parameters of defocus amount, transverse distance, laser energy and time delay The detection limits of the elements were 1.2, 3.2, 19.1, 3.4, 2.8 and 15.9 ppm, respectively, and the linear fitting coefficients were above 0.99.The experimental results showed that the gas atomization assisted laser induced breakdown spectroscopy was a rapid online detection Effective method of trace metal elements in liquids.