光谱学与光谱分析 |
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Investigation of Cu Concentration in the CuSO4 Solution by Laser Induced Breakdown Spectroscopy |
ZHANG Ya-wei1, GAO Xun1*, ZHANG Yuan1, YUAN Tong2*, LIN Jing-quan1 |
1. School of Science, Changchun University of Science and Technology,Jilin 130022,China 2. The First Hospital of Jilin University,Changchun 130021,China |
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Abstract 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 7 kinds 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 Ⅰ 324.75 nm and Cu Ⅰ 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.
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Received: 2014-07-31
Accepted: 2014-11-05
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Corresponding Authors:
GAO Xun, YUAN Tong
E-mail: lasercust@163.com;yuantong1967@163.com
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