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
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