LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Chlorine detection in cement with laser-induced breakdown spectroscopy in the infrared and ultraviolet spectral range | Christoph Dominic Gehlen, Eugen Wiens, Reinhard Noll, G. Wilsch, Kenji Reichling | Concrete or Cement | Photomultiplier | Paschen-Runge Spectrometer | |
| Laser: | Nd:YAG 1064.0000nm 450.0000mJ 50.000Hz |
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| Gate Delay: | 0.100us | ||||
| Gate Width: | 10.000us | ||||
| Both the IR Cl peak at 837.59nm and the UV peak at 134.72nm are investigate for their ability to detect Chlorine in concrete. Measurements are performed in a sample chamber which can be filled with He gas - to improve the detection limits by the use of a buffer gas, and to reduce the UV absorption that would occur in air. Interestingly the Cl peak intensity as a function of He gas pressure was different for the IR compared to the UV peak. Single and Double Pulse LIBS are compared. | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|---|---|---|---|---|---|
| Cl | 1000.0000 (Calibration Curve Slope) | 134.7200 | N/A | Univariate | 500.0000-40000.0000 | Helium atmosphere. Peak intensity ratioed to Background at 861nm |
| Cl | 2300.0000 (Calibration Curve Slope) | 134.7200 | N/A | Univariate | 500.0000-40000.0000 | 60mbar Helium atmosphere. DP LIBS result, however this is not as good as the single pulse LIBS LOD. |
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
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