LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Underwater sediment analyses by laser induced breakdown spectroscopy and calibration procedure for fluctuating plasma parameters | V. Lazic, F. Colao, R. Fantoni, V. Spizzichino, S. Jovicevic | Soil | Andor IntraSpec | Jobin Yvon 550 | |
| Laser: | Nd:YAG 1064.0000nm 310.0000mJ 10.000Hz |
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| Gate Delay: | Noneus | ||||
| Gate Width: | 3000.000us | ||||
| This paper investigates using LIBS for analysis of soil/sediment samples underwater. Double Pulse LIBS provides significantly better signal as the 2nd laser pulse excites the plasma in its own bubble. Considerable effort was put into optimising the delay and relative energy of the 2 pulses to get the best results. While the ICCD used has considerable flexibility in gate delay and gate width, the settings used attempted to mimic the simpler (Ocean Optics S2000) system which is planned for use in the work outside the lab. Better LODs were expected from a method whereby only spectra with a significant element peak were then used for the spectra to be averaged in the calibration. Results also showed improvement when Ti ratioed to Si, and Mg to Fe | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|---|---|---|---|---|---|
| Ba | 59.0000 (Minimum Concentration Detected) | 455.4000 | 458.0nm | Univariate | 59.0000--10.0000 | Much lower LOD expected, but this is the concentration in the lowest standard available |
| Cu | 114.0000 (Minimum Concentration Detected) | 324.7500 | Univariate | 114.0000--10.0000 | Much lower LOD expected, but this is the concentration in the lowest standard available | |
| Mn | 375.0000 (Minimum Concentration Detected) | 260.6000 | Univariate | 375.0000--10.0000 | Much lower LOD expected, but this is the concentration in the lowest standard available | |
| Ti | 56.0000 (Minimum Concentration Detected) | 325.0000 | 335nm, 453.6nm | Univariate | 59.0000--10.0000 | Much lower LOD expected, but this is the concentration in the lowest standard available |
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
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