LIBS Info: Element Analysis

Title	Authors	Material	Detector	Spectrometer	Software
Heavy Metals Detection in Zeolites Using the LIBS Method	P. Veis, Pavol Hudec, Michal Hornacek, Jozef Plavcan, Michaela Hornackova	Geological	Andor ICCD	Mechelle 5000
Laser:	Nd:YAG 532.0000nm 165.0000mJ 10.000Hz
Gate Delay:	1.000us
Gate Width:	1.000us
Zeolite samples were then spiked with solutions of Cu, Co, Cr, Pb and Cd, dried and then pressed into pellets for analysis. The authors used measurements of Electron Density and Plasma temperature to ensure suitable conditions for LIBS.

LOD
RMSEP

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Element	Detection Limit (ppm)	Wavelength (nm)	Other Wavelengths (nm)	Calibration Method	Calibration Range (ppm)	Notes
Cd	190.7000 (Calibration Curve Slope)	226.5000	508.58nm	Univariate	-10.0000--10.0000	The best overall calibration curve came from the 508.58nm peak ratioed to the Si peak at 243.52nm. However the best LOD came from the more intense 226.5nm peak
Co	18.5000 (Calibration Curve Slope)	348.9400	350.23nm, 350.63nm, 351.26nm, 236.38nm, 239.74nm, 258.22nm, 258.72nm	Univariate	-10.0000--10.0000	Best R^2 came from ratioed sum of 236.38nm + 239.74nm + 258.22nm + 258.72nm to Ca II 393.37 + Mg II 280.27nm. However, lowest LOD came from 348.94nm peak
Cr	16.4000 (Calibration Curve Slope)	425.4300	301.37nm, 301.52nm, 297.19nm, 312.5nm, 320.92nm	Univariate	-10.0000--10.0000	Best linearity came from 297.19nm+312.5nm+320.92nm peaks ratioed to Al II 281.62nm, however, lowest LOD came from 425.43nm peak.
Cu	14.4000 (Calibration Curve Slope)	324.7500	515.32, 521.82	Univariate	-10.0000--10.0000	While a calibration curve using the summed intensities of the 515.32nm + 521.82nm peaks gave the best linearity, the slope of the (self absorbed at high concentration)calibration curve from the 324.75nm peak gave the best detection limit.
Pb	62.6000 (Calibration Curve Slope)	405.7800	283.31nm, 368.34nm	Univariate	-10.0000--10.0000	Best calibration curve (from R^2) was from sum of intensities of Pb peaks at 283.31nm, 368.34nm and 405.78 nm normalised to Si Peak at 390.55nm. However, best LOD came from using unratioed 405.78nm peak.

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Element	RMSE (ppm)	Wavelength (nm)	Calibration Method	Notes
No data available in table

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