LIBS Info: Element Analysis

Title Authors Material Detector Spectrometer Software
Quantitative determination of wear metals in engine oils using laser-induced breakdown spectroscopy: A comparison between liquid jets and static liquids B Pavel Yaroshchyk, Richard J.S. Morrison, Doug Body, Bruce L. Chadwick Oil (jet) Oriel InstaSpec V Oriel MS 257
Laser: Nd:YAG
1064.0000nm
NonemJ
2.000Hz
Gate Delay: Noneus
Gate Width: 1.000us
Comparison is made between detection limits in static liquids (http://www.libs-info.com/paper/46/) and jets (this reference). Paper includes formula/theory for the calculation of the optimal focussing conditions in liquids and jets. Calibrations are then applied to the analysis of wear metals in engine oil samples.
Element Detection Limit (ppm) Wavelength (nm) Other Wavelengths (nm) Calibration Method Calibration Range (ppm) Notes
Na 8.0000 (Stated) 588.9950 N/A Univariate Calibration 1.0000-100.0000 Detection limit is lower than in static liquid by factor of 3.
Mg 0.4000 (Stated) 279.5530 N/A Univariate Calibration 1.0000-100.0000 Detection limit is lower than in static liquid by factor of ~4.
Al 15.0000 (Stated) 309.2700 N/A Univariate Calibration 1.0000-100.0000 Detection limit is lower than in static liquid by factor of ~2.
Ca 0.4000 (Stated) 393.3670 N/A Univariate Calibration 1.0000-100.0000 Detection limit is lower than in static liquid by factor of 15.
Ti 9.3000 (Stated) 334.9040 N/A Univariate Calibration 1.0000-100.0000 Detection limit is lower than in static liquid by factor of ~2.
V 19.0000 (Stated) 310.2300 N/A Univariate Calibration 1.0000-100.0000 Liquid jets LOD is lower than for static surface by factor ~2.
Cr 43.0000 (Stated) 425.4340 N/A Univariate Calibration 1.0000-100.0000 Only detected in liquid jet, not in static surface
Mn 6.0000 (Stated) 257.6100 N/A Univariate Calibration 1.0000-100.0000 Liquid jets LOD is lower than for static surface by factor ~3.
Fe 20.0000 (Stated) 259.9360 N/A Univariate Calibration 1.0000-100.0000 Only detected in jet, not in static surface
Ni 47.0000 (Stated) 352.4540 N/A Univariate Calibration 1.0000-100.0000 LOD only listed for liquid jets
Cu 2.4000 (Stated) 324.7540 N/A Univariate Calibration 1.0000-100.0000 Liquid jets LOD is lower than for static surface by factor ~2.
Zn 11.0000 (Stated) 202.5510 N/A Univariate Calibration 1.0000-100.0000 This LOD is practically identical to the static surfaces LOD.
Mo 31.0000 (Stated) 281.6150 N/A Univariate Calibration 1.0000-100.0000 LOD only stated for jet.
Ag 3.1000 (Stated) 328.0680 N/A Univariate Calibration 1.0000-100.0000 Liquid jets LOD is lower than for static surface by factor ~4.
Cd 10.0000 (Stated) 226.5020 N/A Univariate Calibration 1.0000-100.0000 Liquid jets LOD is lower than for static surface by factor ~2.
Ba 1.4000 (Stated) 455.5440 N/A Univariate Calibration 1.0000-100.0000 Liquid jets LOD is lower than for static surface by factor ~4.


Element RMSE (ppm) Wavelength (nm) Calibration Method Notes