LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Evaluation of a compact spectrograph for in-situ and stand-off Laser-Induced Breakdown Spectroscopy analyses of geological samples on Mars missions | Beatrice Salle, David A. Cremers, Sylvestre Maurice, Roger C. Wiens, Pascal Fichet | Soil | Kodak KAF 1001 | ESA 3000 | |
| Laser: | Nd:YAG 1064.0000nm 40.0000mJ 10.000Hz |
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| Gate Delay: | Noneus | ||||
| Gate Width: | Noneus | ||||
| The key aspect of this work was the evaluation of spectrometers for analysis on Mars (where the atmosphere is 7 torr CO2). The low pressure atmosphere does reduce the background continuum significantly compared to atmospheric pressure measurements. Three configurations were tried - 2 in-situ analysis schemes (lens to sample 15cm), and a standoff scheme (lens to sample 5.3m). These results were compared with using a commercial LIBS spectrometer, and should be compared with using some Ocean Optics HR2000 units (here) Samples for detection limit calculations were made by pressing the material into 32mm sample cups and pressing to 20tons. | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|---|---|---|---|---|---|
| Al | 18600.0000 (Stated) | 391.1400 | N/A | Univariate Calibration | -10.0000--10.0000 | In-situ analysis. RDS= 4% |
| Ba | 30.0000 (Stated) | 455.3900 | N/A | Univariate Calibration | -10.0000--10.0000 | In situ analysis. RSD = 27% |
| Ca | 850.0000 (Stated) | 393.3600 | N/A | Univariate Calibration | -10.0000--10.0000 | In situ analysis. RSD = 7% |
| Fe | 30000.0000 (Stated) | 404.5800 | N/A | Univariate Calibration | -10.0000--10.0000 | In-situ analysis. RSD = 10% |
| Mg | 160.0000 (Stated) | 280.2700 | N/A | Univariate Calibration | -10.0000--10.0000 | In-situ analysis. RSD = 4% |
| Mn | 370.0000 (Stated) | 403.0800 | N/A | Univariate Calibration | -10.0000--10.0000 | In-situ analysis. RSD = 40% |
| Na | 70.0000 (Stated) | 588.9700 | N/A | Univariate Calibration | -10.0000--10.0000 | In-situ analysis. RSD = 11% |
| Si | 90000.0000 (Stated) | 288.1800 | N/A | Univariate Calibration | -10.0000--10.0000 | In-situ analysis. RSD = 3% |
| Sr | 30.0000 (Stated) | 407.7800 | N/A | Univariate Calibration | -10.0000--10.0000 | In-situ analysis. RSD = 35% |
| Ti | 2400.0000 (Stated) | 398.9200 | N/A | Univariate Calibration | -10.0000--10.0000 | In-situ analysis. RSD = 37% |
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
|---|