Elemental analysis by microwave-assisted laser-induced breakdown spectroscopy: Evaluation on ceramics
Abbreviated Journal Title
J. Anal. At. Spectrom.
PLASMA; PULSE; ENHANCEMENT; ABLATION; EMISSION; SAMPLES; LIBS; Chemistry, Analytical; Spectroscopy
A new Laser-Induced Breakdown Spectroscopy (LIBS) enhancement method utilizing interaction between microwave radiation and laser-induced plasma has been evaluated. Experimental parameters such as laser pulse irradiance, microwave duration, and surrounding gas were studied and optimized for the microwave effect through a series of experiments on a piece of alumina ceramic sample. Up to 33 times enhancement on different spectral lines was achieved. Enhancement of the line intensity was found to be at a maximum when the laser ablation was induced at low irradiance on a large area in normal atmosphere. The enhancement was element-dependent and stronger for transitions with low excitation energy. The microwave enhancement in argon atmosphere was not as effective as in air, and the reasons are discussed.
Journal of Analytical Atomic Spectrometry
"Elemental analysis by microwave-assisted laser-induced breakdown spectroscopy: Evaluation on ceramics" (2010). Faculty Bibliography 2010s. 454.