Details

Autor(en) / Beteiligte

• Jiang, Yinhua
• Lin, Zehao
• Li, Runhua
• Chen, Yuqi

Titel

Improving the analytical sensitivity of orthogonal double-pulse laser-induced breakdown spectroscopy with target-enhancement

Ist Teil von

• Spectrochimica acta. Part B: Atomic spectroscopy, 2021-07, Vol.181, p.106221, Article 106221

Ort / Verlag

Oxford: Elsevier B.V

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The analytical sensitivity of conventional reheating orthogonal double-pulse laser-induced breakdown spectroscopy (ODP-LIBS) was improved using a solid target. In the experiments, the first laser was shot on the sample surface to produce sample plasma and the second time-delayed laser was shot on the target surface to produce target plasma. Sample and target were spatially arranged with orthogonal orientations. Through the interaction between target plasma and sample plasma, the optical emissions of the analytes can be enhanced significantly. To evaluate the analytical sensitivity improvement factor of this technique, copper and lead in water samples were quantitatively analyzed using wood slice as water absorber to realize matrix conversion. The detection limit of copper and lead in water determined with this technique using aluminum target was 49 ng/mL and 180 ng/mL, respectively. The enhancement factor in comparison with those obtained by ODP-LIBS without using target-enhancement was 4.5 and 3.8, respectively. This work demonstrates that the analytical sensitivity of ODP-LIBS can be obviously improved with target-enhancement. [Display omitted] •A solid target was used to significantly enhance analytes' emissions in reheating DP-LIBS.•Sensitive quantitative metal analysis in water was carried out with this technique.•The analysis was carried out in air at atmospheric pressure.•49 ng/mL and 180 ng/mL detection limits for Cu and Pb in water were obtained.•4.5 and 3.8 improvement factors on analytical sensitivity of Cu and Pb were demonstrated.