研究目的
Investigating the enhancement of spectral intensity of uranium in ores and reduction of spectral interference using LIBS-LIF technology.
研究成果
LIBS-LIF technology significantly improves the sensitivity and accuracy of uranium detection in ores, demonstrating excellent potential in the exploration of uranium resources.
研究不足
The complexity of the ore matrix and the weak emission spectra of uranium in LIBS pose challenges for detection.
1：Experimental Design and Method Selection:
LIBS-LIF technology was used to enhance the spectral intensity of uranium in ores and reduce spectral interference. Different combinations of excitation lines and analytical lines of the U element were investigated.
2：Sample Selection and Data Sources:
Four uranium core samples approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and four mixed samples were used.
3：List of Experimental Equipment and Materials:
A Q-switched Nd:YAG laser, an optical parametric oscillator (OPO) wavelength-tunable laser, a light collector, a Czerny–Turner spectrograph, and an intensified charge-coupled device (ICCD) camera were used.
4：Experimental Procedures and Operational Workflow:
The spectra of plasma emission were collected and analyzed to determine the elemental composition and content of the sample.
5：Data Analysis Methods:
The slope of the calibration curves, the coefficient of determination (R2), the limit of detection (LoD), the average relative standard deviation (ARSD), the root mean square error (RMSE), and the average relative error (ARE) were used to evaluate the analytical sensitivity.
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Q-switched Nd:YAG laser
Brilliant series
Quantel
Sample ablation and plasma generation
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Light collector
84-UV-25
Ocean Optics
Collection of plasma emission spectrum
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Digital delay generator
DG535
Stanford Instruments
Control of the trigger time of the two laser devices and ICCD
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Optical parametric oscillator (OPO) wavelength-tunable laser
Vibrant HE 355 LD
Opotek
Excitation source for fluorescence in the plasma
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Czerny–Turner spectrograph
SCT320
Princeton Instruments
Analysis of plasma emission spectrum
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Intensified charge-coupled device (ICCD) camera
Max3
Princeton Instruments
Recording the spectrum
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