LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Quantitative Determination of Manganese in Aqueous Solutions and Seawater by Laser-Induced Breakdown Spectroscopy (LIBS) Using Paper Substrates [Echelle] | Junshan Xiu, Shilei Zhong, Huaming Hou, Yuan Lu, Ronger Zheng | Liquids | Andor ICCD | Mechelle 5000 | |
| Laser: | Nd:YAG 1064.0000nm 60.0000mJ 10.000Hz |
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| Gate Delay: | 1.200us | ||||
| Gate Width: | 4.000us | ||||
| Whatman 42 filter papers were used as the substrate to the absorb the liquid prior to analysis. The paper was dipped into the sample, then allowed to rest on the analysis surface for several minutes prior to analysis. Samples were not dried. It was also found that 2 layers of filter paper worked better as it prevented laser breakthrough to the metal plate under the samples. This describes the results using a Czerny Turner spectrometer, then next paper describes the results using an echelle spectrometer. While the detection limits for the echelle were higher than the Czerny Turner, the compact size of the echelle and wide spectral range could provide advantages for field deployment. Higher LODs were also found for mixed (ie. not just the element of interest in solution) vs pure samples. | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|---|---|---|---|---|---|
| Mn | 2.3300 (Calibration Curve Slope) | 257.6100 | N/A | Univariate | -10.0000--10.0000 | LOD in Mixture solution: 2.87ppm, LOD in seawater: 2.73ppm |
| Cu | 1.6700 (Calibration Curve Slope) | 324.7000 | N/A | Univariate | -10.0000--10.0000 | LOD in mixture: 2.13ppm |
| Cd | 5.3200 (Calibration Curve Slope) | 226.5000 | N/A | Univariate | -10.0000--10.0000 | LOD in mixture: 6.56. Ratio to H(alpha) peak for better performance |
| Cr | 3.9800 (Calibration Curve Slope) | 360.5300 | N/A | Univariate | -10.0000--10.0000 | (Surprisingly) LOD in pure was higher: 4.74ppm. Ratio to H(alpha) peak for better performance |
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
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