CuSO_4溶液中Cu元素浓度的激光诱导击穿光谱测量研究  

Investigation of Cu Concentration in the CuSO_4 Solution by Laser Induced Breakdown Spectroscopy

作　　者：张亚维[1] 高勋[1] 张原[1] 袁彤[2] 林景全[1] 

机构地区：[1]长春理工大学理学院,吉林长春130022 [2]吉林大学第一医院,吉林长春130021

出　　处：《光谱学与光谱分析》2015年第8期2308-2311,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(11074027;61178022);吉林省科技厅项目(201215132);教育部博士点基金-新教师项目(20112216120006)资助

摘　　要：利用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。利用配置的七种浓度的CuSO4溶液,采用统计探索性数据分析方法给出了Cu元素定标曲线,其拟合度系数R2大于0.98,激光诱导击穿光谱的平均相对偏差值为6.9%,Cu元素的平均最小检测限为12ppm。利用去一交互检验方法采用分析谱线CuⅠ324.75nm和CuⅠ327.40nm对应的七种溶液的平均测量相对误差分别为6.52%和5.86%。当Cu元素浓度在10ppm时实验相对误差较大,其值为10.3%,而浓度达到2 000ppm时相对误差值减小,仅为1.1%,说明LIBS技术在溶液较低元素浓度检测方面的准确度有待提高。研究结果表明激光诱导击穿光谱技术在环境水污染重金属元素检测方面具有潜在的应用前景。In this paper,the concentration of copper element in the CuSO4 solution was measured by Laser Induced Breakdown Spectroscopy with aqueous jets.We used the CuSO4 solution with 7kinds of concentration and adopted statistical exploratory data analysis method to get calibration curve of Cu,whose linear fitting coefficient R2 was larger than 0.98.The average RSD of LIBS was 6.96%,and the average LOD of Cu was determined to be 12 ppm.The values of relative error by analyzing Cu Ⅰ324.75 nm and CuⅠ 327.40 nm spectral lines were respectively 6.52% and 5.86%,with the method called leave-one-out cross validation.The experimental relative error had a greater value,which was 10.3%,when the concentration of Cu was 10 ppm.However,the relative error decreased to 1.1%for the concentration of 2 000 ppm,which indicated that LIBS need to be studied on its accuracy further in detecting lower analytical concentrations.LIBS has the promising application in detecting heavy metal elements in the environmental wastewater pollution.

关 键 词：激光诱导击穿光谱 液体射流 定量分析 相对误差 

分 类 号：O657.3[理学—分析化学]