LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Direct determination of Ca, K, Mg, Na, P, S, Fe and Zn in bivalve mollusks by wavelength dispersive X-ray fluorescence (WDXRF) and laser-induced breakdown spectroscopy (LIBS) | Diego Victor de Babos, Edenir Rodrigues Pereira-Filho, Fabio Alan Carqueija Amorim, Vinicius Camara Costa | Biological | Applied Spectra J200 | Applied Spectra J200 | Microsoft Excel |
| Laser: | Nd:YAG 1064.0000nm 40.0000mJ 5.000Hz |
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| Gate Delay: | 1.000us | ||||
| Gate Width: | 1050.000us | ||||
| The authors compare the performance of Wavelength Dispersive XRF with LIBS for the analysis of elements in Molluscs. LIBS analysis used pellets made from freeze dried mollusc samples. Extensive work was undertaken to determine the best conditions for sample analysis with the Standard Error of Calibration being the optimised parameter. | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|---|---|---|---|---|---|
| Na | 20.0000 (Calibration Curve Slope) | 588.9900 | N/A | Univariate | -10.0000--10.0000 | Analysis of dried mollusc pellets after extensive parameter optimisation |
| Mg | 10.0000 (Calibration Curve Slope) | 285.2100 | N/A | Univariate | -10.0000--10.0000 | Analysis of dried mollusc pellets after extensive parameter optimisation |
| K | 5.0000 (Calibration Curve Slope) | 766.4900 | N/A | Univariate | -10.0000--10.0000 | Analysis of pellets of dried mollusc |
| Ca | 7.0000 (Calibration Curve Slope) | 527.0500 | N/A | Univariate | -10.0000--10.0000 | Result of optimising experimental conditions |
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
|---|---|---|---|---|
| Na | 0.9300 % | 588.9900 | Univariate Calibration | Analysis of dried mollusc pellets after extensive parameter optimisation. Average of 13 samples. By comparison, WDXRF RMSEP=0.18% |
| Mg | 0.0680 % | 285.2100 | Univariate Calibration | Analysis of dried mollusc pellets after extensive parameter optimisation. Average of 28 samples. By comparison, WDXRF RMSEP=0.043% |
| K | 0.0680 % | 766.4900 | Univariate Calibration | Analysis of dried mollusc pellets after extensive parameter optimisation. Average of 28 samples. By comparison, WDXRF RMSEP=0.063% |
| Ca | 0.0690 % | 527.0500 | Univariate Calibration | Average over 28 samples. By comparison, XRF (Wavelength Dispersive) had RMSEP: 0.043% |