LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Analytical Analysis of Different Karats of Gold Using Laser Induced Breakdown Spectroscopy (LIBS) and Laser Ablation Time of Flight Mass Spectrometer (LA-TOF-MS) | M.A. Baig, Rizwan Ahmed, Nasar Ahmed | Metals | AvaSpec-2048-SPU | AvaSpec-2048-SPU | AVASOFT |
| Laser: | Nd:YAG 532.0000nm 400.0000mJ 10.000Hz |
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| Gate Delay: | Noneus | ||||
| Gate Width: | Noneus | ||||
| Calibration Free LIBS is used to determine the Karat [18/19/20/22/24] for Gold composition in alloys. Calculations of plasma temperature and electron density were also performed and we consistent across the samples, showing low levels of self-absorption. Concentrations were compared to LA-TOF-MS analysis. | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|---|---|---|---|---|---|
| Cu | 17.7500 (Calibration Curve Slope) | -10.0000 | N/A | Univariate | -10.0000--10.0000 | Analysis of jewellery grade Au/Ag/Cu samples |
| Ag | 4.3000 (Calibration Curve Slope) | 328.0000 | N/A | Univariate | -10.0000--10.0000 | Normalised to Au peak at 312nm. Analysis of jewellery grade Au/Ag/Cu alloys |
| Au | 0.0500 (Calibration Curve Slope) | 312.2800 | N/A | Univariate | 750000.0000-999000.0000 | Main part of this work uses CF-LIBS for analysis of Gold samples, however this LOD was determined using Univariate Calibration |
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
|---|---|---|---|---|
| Au | 14142.1356 ppm | -10.0000 | CF-LIBS | . . . Analysis of jewellery grade Au/Ag/Cu alloys |