LIBS Info: Element Analysis

Title	Authors	Material	Detector	Spectrometer	Software
The influence of multivariate analysis methods and target grain size on the accuracy of remote quantitative chemical analysis of rocks using laser induced breakdown spectroscopy [PLS]	Rhonda McInroy, Trevor G. Graff, Stanley A. Mertzman, Seth D. Humphries, James F. Bell III, Roger C. Wiens, Richard V. Morris, Ryan B. Anderson, S.M. Clegg	Geological	Ocean Optics HR2000	Ocean Optics HR2000
Laser:	Nd:YAG 1064.0000nm 17.0000mJ 10.000Hz
Gate Delay:	Noneus
Gate Width:	Noneus
The sample data was collected on an instrument designed to simulate the ChemCam on Mars - 7m standoff LIBS, 7 Torr CO2. The researchers used Chemometrics/Multivariate Analysis [PLS] and several types of Neural Network [ANN]

LOD
RMSEP

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Element	Detection Limit (ppm)	Wavelength (nm)	Other Wavelengths (nm)	Calibration Method	Calibration Range (ppm)	Notes
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Element	RMSE (ppm)	Wavelength (nm)	Calibration Method	Notes
Al	4.1400 %	-10.0000	PLS	7 Torr CO2 Atmosphere. Rock Slabs.
Ca	1.6700 %	-10.0000	PLS	7 Torr CO2 Atmosphere. Rock Slabs.
Fe	4.8200 %	-10.0000	PLS	7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance.
K	0.8700 %	-10.0000	PLS	7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance.
Mg	2.3700 %	-10.0000	PLS	7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance.
Mn	0.4900 %	-10.0000	PLS	7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance.
Na	1.0600 %	-10.0000	PLS	7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance.
Si	4.8800 %	-10.0000	PLS	7 Torr CO2 atmosphere, on pressed pellets and rock slabs.
Ti	0.6100 %	-10.0000	PLS	7 Torr CO2 Atmosphere. Rock Slabs. Feature Selection used to provide best performance.

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