中国激光, 2012, 39 (2): 0215001, 网络出版: 2011-12-19
液体射流激光击穿光谱检测重金属研究
Research about Analysis of Heavy Metals in Liquid Jet by Laser-Induced Breakdown Spectroscopy
光谱学 液体射流 激光诱导击穿光谱 重金属 探测限 spectroscopy liquid jet injection laser-induced breakdown spectroscopy heavy metal detection limit
摘要
基于自行研制的新型液体射流的激光诱导击穿光谱(LIBS)实验装置,研究了实验条件(如积分延时、激光能量等)对金属LIBS谱线强度的影响。实验获取了K2Cr2O7、Pb(NO3)2和CdBr2水溶液样品在532 nm激光激发下的等离子体发射光谱,标识了Cr、Pb和Cd等重金属元素的特征谱线,获得Cr、Pb、Cd的探测限约为0.32、15.6、57.6 mg/L,展示了液体射流LIBS用于水体中重金属快速检测的能力。
Abstract
The effects of the experimental conditions (integration delay, laser energy and so on) on the strength of metal LIBS (laser-induced breakdown spectroscopy) spectra are investigated using a self-developed new liquid jet by LIBS. The plasma emission spectra of K2Cr2O7, Pb(NO3) and CdBr2 aqueous solutions at 532 nm laser excitation is obtained. And the characteristic spectral lines of toxic metals Cr, Pb and Cd are identified. It is found that the detection limits of Cr, Pb and Cd are respectively about 0.32, 15.6 and 57.6 mg/L. The results unfold the rapid detection capability of the liquid jet by LIBS on toixc metal in water.
闫静, 丁蕾, 葛琳琳, 王颖萍, 郑海洋, 方黎. 液体射流激光击穿光谱检测重金属研究[J]. 中国激光, 2012, 39(2): 0215001. Yan Jing, Ding Lei, Ge Linlin, Wang Yingping, Zheng Haiyang, Fang Li. Research about Analysis of Heavy Metals in Liquid Jet by Laser-Induced Breakdown Spectroscopy[J]. Chinese Journal of Lasers, 2012, 39(2): 0215001.