激光与光电子学进展, 2019, 56 (7): 073002, 网络出版: 2019-07-30
液相基质激光诱导击穿光谱的关键实验参数优化 下载: 1052次
Key Experimental Parameter Optimization for Laser Induced Breakdown Spectroscopy of Liquid Matrix
光谱学 激光诱导击穿光谱 实验参数优化 液体射流取样技术 信噪比 spectroscopy laser induced breakdown spectroscopy experimental parameter optimization liquid jet sampling technique signal to noise ratio
摘要
为提高液相基质激光诱导击穿光谱(LIBS)技术的检测灵敏度,必须优化光谱探测系统的关键实验参数。采用液体射流取样技术,以混合水溶液中Pb、Cr、Cd、Mn、Ca、Al等金属元素已选定的分析线为研究对象,以金属元素LIBS信号的信噪比最大化为优化标准,在增强型电荷耦合器件(ICCD)门宽为0.3 μs条件下,对激光脉冲能量、ICCD门延时、液体样品流速等关键系统参数进行了优化,结果分别为50 mJ、2.0 μs和40 mL/min。
Abstract
In order to improve the detection sensitivity for the technique of laser induced breakdown spectroscopy (LIBS) of liquid matrix, the key parameters of the spectroscopic detection system must be optimized. The liquid jet sampling technique is adopted. The analysis lines of six metal elements of Pb, Cr, Cd, Mn, Ca, and Al mixed in an aqueous solution are selected. The maximization of the signal-to-noise ratio of LIBS signals for each metal element is used as the optimizing criterion. When the gate width of an intensified charge-coupled device (ICCD) is 0.3 μs, the key system parameters of laser pulse energy, ICCD gate delay and liquid sample flow rate, are optimized as 50 mJ, 2.0 μs and 40 mL/min, respectively.
李乘, 姚关心, 杨新艳, 秦正波, 郑贤锋, 崔执凤. 液相基质激光诱导击穿光谱的关键实验参数优化[J]. 激光与光电子学进展, 2019, 56(7): 073002. Cheng Li, Guanxin Yao, Xinyan Yang, Zhengbo Qin, Xianfeng Zheng, Zhifeng Cui. Key Experimental Parameter Optimization for Laser Induced Breakdown Spectroscopy of Liquid Matrix[J]. Laser & Optoelectronics Progress, 2019, 56(7): 073002.