LIBS Info: Element Analysis

Title Authors Material Detector Spectrometer Software
Quantitative determination of wear metals in engine oils using LIBS: The use of paper substrates and a comparison between single- and double-pulse LIBS Pavel Yaroshchyk, Richard J.S. Morrison, Doug Body, Bruce L. Chadwick Oil (double pulse) Oriel InstaSpec V Oriel MS 257
Laser: Nd:YAG
1064.0000nm
NonemJ
1.000Hz
Gate Delay: 1.000us
Gate Width: 1.000us
Oil samples for analysis were added dropwise until approximately 0.6g was spread over a filter paper (34mm diameter). This was then left for 15mins to dry before analysis. Best results came from using 95mJ pulse before the 170mJ pulse. Results from single pulse (http://www.libs-info.com/paper/48/) and double pulse [crossed beams] (this ref) were compared. In general results on filter papers were lower than on jets or static liquids. Some elements did, however, suffer interferences from elements in the paper [Ca, Na, Mg, Ba]. Results compared favourably when military aviation oil was analysed
Element Detection Limit (ppm) Wavelength (nm) Other Wavelengths (nm) Calibration Method Calibration Range (ppm) Notes
Ag 1.0000 (Stated) 328.0680 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~2 over single pulse on filter paper substrates.
Al 4.0000 (Stated) 309.2700 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~2 over single pulse on filter paper substrates.
Cd 4.0000 (Stated) 226.5020 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~2 over single pulse on filter paper substrates.
Cr 12.0000 (Stated) 425.4340 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~2 over single pulse on filter paper substrates.
Cu 1.0000 (Stated) 324.7540 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~4 over single pulse on filter paper substrates.
Fe 3.0000 (Stated) 259.9360 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD no significant improvement over single pulse on filter paper substrates.
Mn 3.0000 (Stated) 257.6100 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD no significant improvement over single pulse on filter paper substrates.
Mo 5.0000 (Stated) 281.6150 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced no significant improvement in LOD over single pulse on filter paper substrates.
Ni 7.0000 (Stated) 339.2980 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~3 over single pulse on filter paper substrates.
Ti 2.0000 (Stated) 334.9040 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~2 over single pulse on filter paper substrates.
V 2.0000 (Stated) 310.2300 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~2 over single pulse on filter paper substrates.
Zn 2.0000 (Stated) 202.5510 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~2 over single pulse on filter paper substrates.
Si 11.0000 (Stated) 251.6110 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~2 over single pulse on filter paper substrates.
Pb 3.0000 (Stated) 208.8420 N/A Univariate Calibration 1.0000-100.0000 Double pulse LIBS produced LOD improvement of ~6 over single pulse on filter paper substrates.


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