LIBS Info: Element Analysis
| Title | Authors | Material | Detector | Spectrometer | Software |
|---|---|---|---|---|---|
| Analysis of preservative-treated wood by multivariate analysis of laser-induced breakdown spectroscopy spectra | Madhavi Z. Martin, Nicole Labbe, Timothy G. Rials, Stan D. Wullschleger | Timber | Andor ICCD | Catalina SE 200 | |
| Laser: | Nd:YAG 532.0000nm 50.0000mJ 2.000Hz |
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| Gate Delay: | Noneus | ||||
| Gate Width: | Noneus | ||||
| This report describes the design and evaluation of a LIBS system capable of rapid, accurate, and simultaneous analysis of multiple inorganic constituents in wood. The system is used to identify elements of interest in Copper Chrome Arsenic, Alkaline Copper Quat and ammoniacal Copper Zinc -treated wood from two forest tree species; EasternHemlock and Douglas Fir. The Unscrambler software was used to form PCA and PLS models from the LIBS spectra. PCA analysis showed clear discrimination between the CCA, ACQ and ACZA samples. PLS models for Cu, Zn and As concentration in the different treatments/woods were also prepared. These showed RMSEP < 1% for mosetelements | |||||
| Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
|---|
| Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
|---|---|---|---|---|
| Cu | 0.2720 % | -10.0000 | PLS | This is the best RMSEP for Cu. RMSEP values ranged from 0.272-0.913% for Cu RMSE Calibration values ranged from 0.08-0.593% |
| Zn | 0.6730 % | -10.0000 | PLS | RMSE Calibration: 0.224% |
| As | 0.5930 % | -10.0000 | PLS | RMSEP: 0.593-0.897% RMSEC: 0.192-0.497% |
| Cr | 0.6250 % | -10.0000 | PLS | RMSEP: 0.625-1.089% RMSE Calibration: 0.224-0.416% |