Simultaneous Determination of Trace Lead and Chromium in Water Using Laser-Induced Breakdown Spectroscopy and Paper Substrate  

作　　者：於有利 周卫东 钱慧国 苏雪娇 任可 

机构地区：[1]Institute of Information Optics, Zhejiang Normal University [2]Physics Department, University of Science and Technology of China

出　　处：《Plasma Science and Technology》2014年第7期683-687,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.61178034);Key Research Project of University of Zhejiang Province,China(No.ZD2009006);the Program for Innovative Research Team,Zhejiang Normal University,China

摘　　要：Toxic metals such as lead and chromium in aqueous solutions have been analyzed simultaneously by laser-induced breakdown spectroscopy（LIBS）, in which the ordinary printing paper is used as a liquid absorber which was immerged into Pb（NO3）2and Cr（NO3）3aqueous solution to enrich the heavy metals. This method overcomes the drawbacks of splashing and low sensitivity in ordinary LIBS analysis of water, in which a laser beam is directly focused on a liquid surface. A good signal intensity and reproducibility has been demonstrated. The Pb 405.78 nm and Cr 427.48 nm spectral lines are used as the analytical lines. The variation of line intensity with immersion time was investigated. The calibration curve for quantitative measurement of Pb and Cr in water was established, and the detection limits are 0.033 mg/L and 0.026 mg/L respectively,which is about 2-3 orders of magnitude better than that in the ordinary LIBS analysis of heavy metal in solution.Toxic metals such as lead and chromium in aqueous solutions have been analyzed simultaneously by laser-induced breakdown spectroscopy（LIBS）, in which the ordinary printing paper is used as a liquid absorber which was immerged into Pb（NO3）2and Cr（NO3）3aqueous solution to enrich the heavy metals. This method overcomes the drawbacks of splashing and low sensitivity in ordinary LIBS analysis of water, in which a laser beam is directly focused on a liquid surface. A good signal intensity and reproducibility has been demonstrated. The Pb 405.78 nm and Cr 427.48 nm spectral lines are used as the analytical lines. The variation of line intensity with immersion time was investigated. The calibration curve for quantitative measurement of Pb and Cr in water was established, and the detection limits are 0.033 mg/L and 0.026 mg/L respectively,which is about 2-3 orders of magnitude better than that in the ordinary LIBS analysis of heavy metal in solution.

关 键 词：LIBS SOLUTION quantitative analysis paper substrate 

分 类 号：TN249[电子电信—物理电子学] O433[机械工程—光学工程]