LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| The influence of multivariate analysis methods and target grain size on the accuracy of remote quantitative chemical analysis of rocks using laser induced breakdown spectroscopy [PLS] | Rhonda McInroy, Trevor G. Graff, Stanley A. Mertzman, Seth D. Humphries, James F. Bell III, Roger C. Wiens, Richard V. Morris, Ryan B. Anderson, S.M. Clegg | Geological | Ocean Optics HR2000 | Ocean Optics HR2000 | |
| Laser: | Nd:YAG 1064.0000nm 17.0000mJ 10.000Hz |
||||
| Gate Delay: | Noneus | ||||
| Gate Width: | Noneus | ||||
| The sample data was collected on an instrument designed to simulate the ChemCam on Mars - 7m standoff LIBS, 7 Torr CO2. The researchers used Chemometrics/Multivariate Analysis [PLS] and several types of Neural Network [ANN] | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
|---|---|---|---|---|
| K | 0.8700 % | -10.0000 | PLS | 7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance. |
| Na | 1.0600 % | -10.0000 | PLS | 7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance. |
| Ca | 1.6700 % | -10.0000 | PLS | 7 Torr CO2 Atmosphere. Rock Slabs. |
| Mg | 2.3700 % | -10.0000 | PLS | 7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance. |
| Mn | 0.4900 % | -10.0000 | PLS | 7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance. |
| Fe | 4.8200 % | -10.0000 | PLS | 7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance. |
| Al | 4.1400 % | -10.0000 | PLS | 7 Torr CO2 Atmosphere. Rock Slabs. |
| Ti | 0.6100 % | -10.0000 | PLS | 7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance. |
| Si | 4.8800 % | -10.0000 | PLS | 7 Torr CO2 atmosphere, on pressed pellets and rock slabs. |