Determination of elemental depth profiles by multi-spot averaging technique of LIBS spectra

Development of laser induced breakdown spectroscopy for studying erosion, deposition, and fuel retention in ASDEX Upgrade

“…The spectra of the first laser pulses were, however, not representative for the analyses because of heavy surface contamination (including water vapor) resulting from sample fabrication and storage phases. For a single spot, the spectrum was noisy and the intensity of spectral lines fluctuated from shot-to-shot, but averaging over 10 spots [10] smoothed remarkably the fluctuations. Fig.…”

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

“…Future work by these authors will be to study calibrated samples and to develop better models of dependency between the spectroscopic signals and the material matrix so that a better estimate of hydrogen isotope presence can be made. Other authors to have presented work using LIBS to characterize walls of reactors included Almaviva et al, 197 Paris et al 198 and Mercadier et al 199 In the paper by Paris et al, 198 the fluctuations in the signal to background ratio of single shot LIBS spectra led the authors to develop a procedure in which spectra from different sites on the sample were averaged. This improved the signal to background ratio significantly and yielded depthprofile data in good qualitative agreement with those obtained using other techniques, e.g., SIMS and RBS.…”

Mechanization of measurement of laser induced breakdown spectroscopy/ring-oven pre-concentration: determination of copper in cachaça

“…4 Lateral and depth spatial resolutions are easily achieved. [5][6][7] Despite the efforts to extend the scope of LIBS to samples in all physical states (gaseous, liquid and solid), the success of the technique has been undoubtedly attested only for solid samples. The difficulties with liquid samples arise from the lose of laser pulse energy to volatilize sample solvents, resulting in lower energy for sample ablation and excitation, and from changes in the liquid surface following the incidence of laser pulses.…”