Evaluation of the temporal profiles and the analytical features of a laser ablation - Pulsed glow discharge coupling for optical emission spectrometry
Abstract
The coupling of a glow discharge (GD) in pulsed mode (PGD) as secondary source for excitation/ionization of the material provided by laser ablation (LA) has been investigated using optical emission spectrometry (OES). The variation of the laser pulse delay with respect to the GD pulse allows to producing the ablation process during prepeak, plateau or afterglow GD regions. Emission properties of the LA-PGD plasma in each temporal region of the GD pulse have been evaluated for analytical lines of different elements. Resonant atomic lines have shown higher emission intensity in the prepeak region compared to non-resonant lines. Non-resonant lines showed higher enhancement of the emission intensity in the afterglow region. Moreover, the coupled LA-PGD system offered better linear correlation coefficients using a set of glass standards for calibration as well as lower detection limits (by at least a factor of two) when compared to laser induced breakdown spectroscopy.
- Publication:
-
Spectrochimica Acta - Part B: Atomic Spectroscopy
- Pub Date:
- July 2016
- DOI:
- 10.1016/j.sab.2016.05.007
- Bibcode:
- 2016AcSpB.121...47G
- Keywords:
-
- Pulsed glow discharge;
- Laser induced breakdown spectroscopy;
- Optical emission spectrometry;
- Laser ablation