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 

作者机构：Far Eastern Federal University Institute of Automation and Control ProcessesFar Eastern BranchRussian Academy of Sciences 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2015年第17卷第11期

页      面：975-978页

核心收录：

学科分类：081704[工学-应用化学] 080901[工学-物理电子学] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 080401[工学-精密仪器及机械] 070302[理学-分析化学] 0804[工学-仪器科学与技术] 0703[理学-化学] 0803[工学-光学工程] 

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 

主　　题：femtosecond laser-induced breakdown spectroscopy LIBS femtosecond plasma iron analysis of water atomic emission spectroscopy limit of detection 

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.