Determination of Iron in Water Solution by Time-Resolved Femtosecond Laser-Induced Breakdown Spectroscopy  

作　　者：Sergey S.GOLIK Alexey A.ILYIN Michael Yu.BABIY Yulia S.BIRYUKOVA Vladimir V.LISITSA Oleg A.BUKIN 

机构地区：[1]Far Eastern Federal University [2]Institute of Automation and Control Processes,Far Eastern Branch,Russian Academy of Sciences

出　　处：《Plasma Science and Technology》2015年第11期975-978,共4页等离子体科学和技术（英文版）

基　　金：supported by the Russian Science Foundation(agreement#14-50-00034)(measurements of limit of detection);Russian Foundation for Basic Research(NK 15-32-20878/15)obtained in the frame of "Organization of Scientific Research"in the Far Eastern Federal University supported by Ministry of Education and Science of Russian Federation

摘　　要：The influence of the energy of femtosecond laser pulses on the intensity of Fe I （371.99 nm） emission line and the continuous spectrum of the plasma generated on the surface of Fe^3＋ water solution by a Ti： sapphire laser radiation with pulse duration 〈45 fs and energies up to 7 mJ is determined. A calibration curve was obtained for Fe3＋ concentration range from 0.5 g/L to the limit of detection in water solution, and its saturation was detected for concentrations above 0.25 g/L, which is ascribed to self-absorption. The 3σ- limit of detection obtained for Fe in water solution is 2.6 mg/L in the case of 7 mJ laser pulse energy. It is found that an increase of laser pulse energy insignificantly affects on LOD in the time-resolved LIBS and leads to a slight improvement of the limit of detection.The influence of the energy of femtosecond laser pulses on the intensity of Fe I （371.99 nm） emission line and the continuous spectrum of the plasma generated on the surface of Fe^3＋ water solution by a Ti： sapphire laser radiation with pulse duration 〈45 fs and energies up to 7 mJ is determined. A calibration curve was obtained for Fe3＋ concentration range from 0.5 g/L to the limit of detection in water solution, and its saturation was detected for concentrations above 0.25 g/L, which is ascribed to self-absorption. The 3σ- limit of detection obtained for Fe in water solution is 2.6 mg/L in the case of 7 mJ laser pulse energy. It is found that an increase of laser pulse energy insignificantly affects on LOD in the time-resolved LIBS and leads to a slight improvement of the limit of detection.

关 键 词：femtosecond laser-induced breakdown spectroscopy LIBS femtosecond plasma IRON analysis of water atomic emission spectroscopy limit of detection 

分 类 号：O657.3[理学—分析化学] TN249[理学—化学]