LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Chemical mapping of mine waste drill cores with laser-induced breakdown spectroscopy (LIBS) and energy dispersive X-ray fluorescence (EDXRF) for mineral resource exploration | Kerstin Kuhn, Jeannet A. Meima, Dieter Rammlmair, Christian Ohlendorf | Geological | ARYELLE | ARYELLE | Sophi |
| Laser: | Nd:YAG 1064.0000nm 55.0000mJ 20.000Hz |
||||
| Gate Delay: | 1.500us | ||||
| Gate Width: | Noneus | ||||
| In this paper geological/mine core samples are analysed with both LIBS and Energy Dispersive XRF. These results are calibrated using data obtained from Wavelength Dispersive XRF analysis of sub-samples taken from the core. Univariate and PLS methods are tried for this calibration, but PLS gave significantly better results (for both LIBS and EDXRF). The results were tested using half the samples for PLS calibration, then the other half as test/comparison samples. Results are good, but are dependent on the calibration against samples from the same core. | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
|---|---|---|---|---|
| Ca | 0.2700 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Si | 1.9300 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Fe | 0.2300 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Al | 1.1700 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| K | 0.2500 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Na | 0.0100 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Ti | 0.0400 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Ba | 0.0030 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Pb | 0.0800 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Zn | 0.0600 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Cu | 0.0030 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Co | 0.0020 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Ni | 0.0030 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| S | 0.1200 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Mn | 0.0200 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |
| Mg | 0.1600 % | -10.0000 | Partial Least Squares | Calibration Samples are from the same drill core as then analysed |