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 |
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| 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 |
|---|