LIBS Info: Element Analysis

Title Authors Material Detector Spectrometer Software
Controlled inert gas environment for enhanced chlorine and fluorine detection in the visible and near-infrared by laser-induced breakdown spectroscopy B George Asimellis, Stephen Hamilton, A. Giannoudakos, M. Kompitsas Pharmaceuticals Andor iStar III Jobin-Yvon HRP
Laser: Nd:YAG
Gate Delay: 0.100us
Gate Width: 20.000us
The main point of the paper is to explore the improvement of detection limits for F and Cl. The samples (pharmaceutical and NaCl/NaF) were chosen for their easy preparation for analysis. Experiments were performed in a low pressure (up to 1atm) He environment. S/N was found to be strongly He pressure dependent. 355nm laser provided better sensitivity as it resulted in lower Bremstrahlung background than using 1064nm pulses.
Element Detection Limit (ppm) Wavelength (nm) Other Wavelengths (nm) Calibration Method Calibration Range (ppm) Notes
F 300.0000 (Minimum concentration detected) 685.6000 N/A Univariate Calibration -10.0000--10.0000 No correction by ratio was used as no good candidate element in spectral range.
Cl 3750.0000 (Minimum concentration detected) 837.5900 N/A Univariate Calibration -10.0000--10.0000 The authors anticipated lower detection limits were possible with their apparatus, but did not explore this.

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