LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Quantitative Analysis of Cerium-Gallium Alloys Using a Hand-Held Laser Induced Breakdown Spectroscopy Device | Michael B. Shattan, Howard L. Hall, Matthew T. Cook, Ashwin P. Rao | Metal Alloys | SciAps Z-500 LIBZ analyzer | SciAps Z-500 LIBZ analyzer | SciAps |
| Laser: | Nd:YAG 1064.0000nm 5.0000mJ 10.000Hz |
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| Gate Delay: | 0.450us | ||||
| Gate Width: | Noneus | ||||
| A Cerium/Gallium alloy is analysed using LIBS. This work is a precursor to mapping the Ga concentration in alloy sheets to measure the degree of sample heterogeneity. In this analysis, which used a hand-held LIBS instrument, 10 cleaning shots were used and an Ar purge. Both univariate and multivariate calibration curves were constructed, with the multivariate yielding the best LOD. Finally, concentration mapping of a sample was undertaken. | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|---|---|---|---|---|---|
| Ga | 244.0000 (Calibration Curve Slope) | -10.0000 | N/A | Multivariate | 0.0000-3000.0000 | A regression of: y = b0 + b1 x1 + b2 x2 where y is the Ga concentration, x1 is the ratio of Ga I peak at 287nm to the Cerium peak at 394nm and x2 is the ratio of the Ga I peak at 287nm to the Ce II peak at 413nm |
| Ga | 3180.0000 (Calibration Curve Slope) | 287.4000 | 294.4 | Univariate | 0.0000-30000.0000 | Ratio of the Ga I peak at 287.4nm to the Ce II peak at 413.8nm produced the best results. Using the 294.4nm Ga I peak yielded LODs roughly 10x worse |
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
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