LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Determination of chloride content in concrete structures with laser-induced breakdown spectroscopy | G. Wilsch, F. Weritz, D. Schaurich, H. Wiggenhauser | Concrete or Cement | Acton Spectra Pro | Acton Spectra Pro | |
| Laser: | Nd:YAG 1064.0000nm 300.0000mJ 20.000Hz |
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| Gate Delay: | Noneus | ||||
| Gate Width: | 8600.000us | ||||
| Cement samples, mixed with known amounts of NaCl, then set were used for calibrations. Initial measurements in Air did not come close to the necessary detection limits, so He atmosphere was tried. Test measurements were then performed on concrete cores. A technique involving the ratio of the Ca line at 849.9nm to the O line at 844.6nm was used to differentiate cement/mortar signal from aggregate (which has no Cl). Depth profiling of Concrete samples was also performed, | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|---|---|---|---|---|---|
| Cl | 1500.0000 (Stated) | 837.5940 | N/A | Univariate Calibration | -10.0000--10.0000 | Ratioed to C at 833.5nm for better results. He atmosphere |
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
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