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
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