LIBS Info: Element Analysis

Title	Authors	Material	Detector	Spectrometer	Software
Underwater sediment analyses by laser induced breakdown spectroscopy and calibration procedure for fluctuating plasma parameters	V. Lazic, F. Colao, R. Fantoni, V. Spizzichino, S. Jovicevic	Soil	Andor IntraSpec	Jobin Yvon 550
Laser:	Nd:YAG 1064.0000nm 310.0000mJ 10.000Hz
Gate Delay:	Noneus
Gate Width:	3000.000us
This paper investigates using LIBS for analysis of soil/sediment samples underwater. Double Pulse LIBS provides significantly better signal as the 2nd laser pulse excites the plasma in its own bubble. Considerable effort was put into optimising the delay and relative energy of the 2 pulses to get the best results. While the ICCD used has considerable flexibility in gate delay and gate width, the settings used attempted to mimic the simpler (Ocean Optics S2000) system which is planned for use in the work outside the lab. Better LODs were expected from a method whereby only spectra with a significant element peak were then used for the spectra to be averaged in the calibration. Results also showed improvement when Ti ratioed to Si, and Mg to Fe

LOD
RMSEP

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Element	Detection Limit (ppm)	Wavelength (nm)	Other Wavelengths (nm)	Calibration Method	Calibration Range (ppm)	Notes
Ba	59.0000 (Minimum Concentration Detected)	455.4000	458.0nm	Univariate	59.0000--10.0000	Much lower LOD expected, but this is the concentration in the lowest standard available
Cu	114.0000 (Minimum Concentration Detected)	324.7500		Univariate	114.0000--10.0000	Much lower LOD expected, but this is the concentration in the lowest standard available
Mn	375.0000 (Minimum Concentration Detected)	260.6000		Univariate	375.0000--10.0000	Much lower LOD expected, but this is the concentration in the lowest standard available
Ti	56.0000 (Minimum Concentration Detected)	325.0000	335nm, 453.6nm	Univariate	59.0000--10.0000	Much lower LOD expected, but this is the concentration in the lowest standard available

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

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