| 引用本文格式: Xue Ling,Li Cheng,Yuan Zi-Ling ,Yao Guan-Xin,Qin Zheng-Bo,Zheng Xian-Feng,Yang Xin-Yan,Cui Zhi-Feng. Internal standard CF-LIBS for quantitative analysis of multiple metal elements in mixed aqueous solutions [J]. J. At. Mol. Phys., 2023, 40(2): 023001 (in Chinese) [薛玲,李乘,袁紫灵,姚关心,秦正波,郑贤锋,杨新艳,崔执凤. 基于内标CF-LIBS的混合水溶液中多金属元素的定量分析 [J]. 原子与分子物理学报, 2023, 40(2): 023001] |
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| 基于内标CF-LIBS的混合水溶液中多金属元素的定量分析 |
| Internal standard CF-LIBS for quantitative analysis of multiple metal elements in mixed aqueous solutions |
| 摘要点击 391 全文点击 162 投稿时间：2021-10-18 修订日期：2021-11-14 |
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| DOI编号
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| 中文关键词
水溶液 微量金属元素 定量分析 CF-LIBS 检测精确度 |
| 英文关键词
Aqueous solution Trace metal element Quantitative analysis Calibration-free LIBS Measurement accuracy |
| 基金项目
国家自然科学基金,省市自然科学基金 |
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| 中文摘要
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| 提出一种简化内标CF-LIBS分析方法，并应用于混合水溶液中Cr、Mn、Pb、Cd、Ca、Al、Co等金属元素绝对浓度的定量分析.实验结果表明，在最优化实验参数下产生的激光等离子体满足局部热平衡和光学薄条件，由该分析方法得到的LIBS检测精确度明显优于采用液固转换后的传统CF-LIBS方法，测定的浓度值与配置值的相对误差小于1%，说明应用该内标CF-LIBS方法能够同时精确测定液相基质中的多种微量金属元素的含量. |
| 英文摘要
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| A simpler internal standard method of Calibration-free laser induced breakdown spectroscopy was presented and applied to the quantitative analysis of the concentrations of metal elements Cr, Mn, Pb, Cd, Ca, Al, and Co in prepared mixed aqueous solutions. Our experimental results confirmed the satisfactions with the local thermal equilibrium and optical thin conditions of the laser induced plasma under the optimized experimental parameters. The analysis results showed that the accuracy of LIBS detection is significantly improved compared to the normalized limiting CF-LIBS methods of liquid to solid conversion samples, with a relative error of less than 1% compared to the preparation value. We concluded that this internal standard CF-LIBS method can be applied to the simultaneous and accurate determination of multiple trace metal elements in liquid phase matrices. |
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