Online calibration of laser-induced breakdown spectroscopy for detection of heavy metals in water |
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| Affiliation: | 1. Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China;2. University of Science and Technology of China, Hefei 230026, People's Republic of China;3. Key Laboratory of Optical Monitoring Technology for Environment, Hefei 230031, People's Republic of China |
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| Abstract: | In order to reduce the fluctuation of LIBS detection spectrum of liquid sample, the full-spectrum sum method and the internal standardization method is adopted, using an equal-RSD normalization algorithm to calibrate the detection spectrum. Experiment result shows that the full-spectrum sum method reduced the RSD of parallel samples of Cd and Cr to 9.4％ and 11.06％ from 28.32％ and 31.93％ respectively, yielded better overall calibration than the singleelement internal standardization approach, thereby suggesting that the former method is convenient and effective for online calibration of LIBS for detection of aqueous heavy metals. |
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| Keywords: | LIBS aqueous heavy metals spectroscopic stability spectral calibration full- spectrum sum method equal-RSD normalization algorithm |
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