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 [ANN] | S.M. Clegg, Ryan B. Anderson, Richard V. Morris, Roger C. Wiens, James F. Bell III, Seth D. Humphries, Stanley A. Mertzman, Trevor G. Graff, Rhonda McInroy | 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 | 0.8900 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection and averaging in pre-processing |
| K | 1.0300 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection in pre-processing |
| Na | 1.3500 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection in pre-processing |
| Na | 1.3100 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Spectra analysed without additional processing |
| Ca | 2.1200 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection in pre-processing |
| Ca | 2.5300 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection in pre-processing |
| Mg | 2.5100 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection and averaging in pre-processing |
| Mg | 2.0400 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection in pre-processing |
| Mn | 0.5100 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection and averaging in pre-processing |
| Fe | 4.9200 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection and averaging in pre-processing |
| Fe | 5.3700 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection and averaging in pre-processing |
| Mn | 0.5000 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Spectra averaging in pre-processing |
| Al | 4.7400 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection and Averaging in pre-processing |
| Al | 3.7700 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Spectra analysed without additional processing |
| Ti | 0.9300 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature select in pre-processing |
| Ti | 0.7900 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Feature selection and averaging in pre-processing |
| Si | 7.9500 % | -10.0000 | CC ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Pre-Processing using Feature Selection and Averaging |
| Si | 6.1200 % | -10.0000 | MLP ANN | 7 Torr CO2 Atmosphere. Rock Slabs. Spectra analysed without additional processing |