基于激光诱导击穿光谱技术的混合溶液重金属元素检测

发布时间：2018-04-16 00:01

本文选题：激光诱导击穿光谱 + 液体射流　；参考：《光谱学与光谱分析》2017年06期

【摘要】：利用激光诱导击穿光谱技术对混合溶液中的Cu,Mg,Zn和Cd四种重金属元素进行实验测量,实验中采用波长为1 064nm,脉宽10ns,重频10 Hz的激光器。在蒸馏水中加入CuSO4,Mg(NO3)2,Zn(NO3)2和Cd(NO3)2四种溶质,配置7种不同Cu,Mg,Zn和Cd浓度的混合溶液,采用统计探索性数据分析方法处理LIBS实验数据,得到水溶液中Cu,Mg,Zn和Cd元素的定标曲线,拟合度系数R2均大于0.99,计算出Cu,Mg,Zn和Cd四种元素的检测限分别为5.62,4.71,13.67和4.43ppm,单一溶质CuSO4溶液中的Cu元素的LOD值为3.98ppm。最后对单一溶质和四种溶质的LIBS检测结果差异进行了分析。研究结果表明激光诱导击穿光谱技术在环境水污染多种重金属元素检测方面具有潜在的应用前景。
[Abstract]:The laser induced breakdown spectroscopy was used to measure the four heavy metal elements, Cu, mg, Zn and CD in mixed solution. The laser with wavelength of 1 064 nm, pulse width of 10 ns and repetition frequency of 10 Hz was used in the experiment.In distilled water, four solutes, CuSO4, MgNo3O2ZnN2O2 and Cd(NO3)2, were added to the distilled water. Seven kinds of mixed solutions with different concentrations of Cu, MgN, Zn and CD were mixed. The experimental data of LIBS were treated by statistical exploratory data analysis method. The calibration curves of Cu, MgO, Zn and CD in aqueous solution were obtained, and the calibration curves of Cu, MgO, Zn and CD in aqueous solution were obtained by using statistical and exploratory data analysis method.The fitting coefficient R2 is all greater than 0.99. The detection limits of Cu, mg, Zn and CD are 5.62, 4.71, 13.67 and 4.43 ppm, respectively, and the LOD value of Cu in the solution of single solute CuSO4 is 3.98 ppm.Finally, the difference of LIBS detection results between single solute and four solutes was analyzed.The results show that laser induced breakdown spectroscopy has a potential application in the detection of many heavy metals in environmental water pollution.
【作者单位】：长春理工大学化学与环境工程学院;长春理工大学理学院;
【基金】：国家自然科学基金项目(61575030)资助
【分类号】：O657.31;X832

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