基于静电辅助LIBS技术的液体中重金属元素检测  

Detection of heavy metal element in the liquid by LIBS with electrostatic filed

作　　者：朱洪波[1,2] 张亚维 林星辰[1,3] 韩金樑[2] 王彪 ZHU Hongbo;ZHANG Yawei;LIN Xingchen;HAN Jinliang;WANG Biao(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;Center of Material Science and Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China;Science College,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]中国科学院大学材料科学与光电研究中心,北京100049 [3]哈尔滨工程大学理学院,哈尔滨150001

出　　处：《激光杂志》2020年第12期6-9,共4页Laser Journal

基　　金：国家重点研发计划项目(No.2016YFB0401802)。

摘　　要：利用静电辅助结合激光诱导击穿光谱技术对CuSO4溶液中的Cu元素浓度进行实验测量,选择Cu I 324.75 nm作为分析光谱线,研究了静电辅助单元的静电场电压和电极平板板间距两个参数对光谱强度的影响,并与传统LIBS技术进行了对比研究。实验结果表明,静电辅助LIBS技术得到的光谱强度比传统LIBS高1.56倍,检测限高1.68倍。实验结果证实了静电辅助LIBS技术在液体中重金属元素检测领域可有效提高检测灵敏度和检测精度,在环境水污染领域具有重要的应用价值。Cu element in the CuSO4 solution is detected by Laser induced breakdown spectroscopy(LIBS)combined with electrostatic filed.The studies are focused on the effect of parameters of electrostatic field-voltage and plate distance on spectral intensity,choosing Cu I 324.75 nm as the analysis spectral line.We compare limits of detection of Cu using conventional LIBS and LIBS with electrostatic field.The results demonstrate that the spectral intensity using LIBS with electrostatic field is 1.56 times better than that of the conventional LIBS,and LoD is 1.68 times higher.LIBS with electrostatic field has been verified to be useful to improve detection accuracy,which embodies application value in detecting polluted water in the open air.

关 键 词：LIBS 静电辅助 液体 Cu元素 

分 类 号：O657.3[理学—分析化学]