Improvement of the sensitivity for the measurement of copper concentrations in soil by microwave-assisted laser-induced breakdown spectroscopy

Yuan Liu (1) , Bruno Bousquet (2) , Matthieu Baudelet (1) , Martin Richardson (1)

1 CREOL - The College of Optics and Photonics [Orlando]
2 LOMA - Laboratoire Ondes et Matière d'Aquitaine

This study shows a 23-fold improvement of the sensitivity in the determination of copper in soil samples when using Microwave-Assisted Laser-Induced Breakdown Spectroscopy (MA-LIBS) compared with our conventional LIBS. This comparison between MA-LIBS and LIBS was performed with identical ablation conditions and detection geometry. The signal enhancement obtained with MA-LIBS allowed for the detection of spectral lines related to concentration values as low as 30 mg kg− 1 for copper and 23.3 mg kg− 1 for silver, which were not detected by LIBS.

Mots clés: LIBS; Microwave-assisted LIBS; Copper; Soil; Sensitivity

Domaines: Optique / photonique

Yuan Liu, Bruno Bousquet, Matthieu Baudelet, Martin Richardson. Improvement of the sensitivity for the measurement of copper concentrations in soil by microwave-assisted laser-induced breakdown spectroscopy. Spectrochimica Acta Part B: Atomic Spectroscopy, 2012, 73, pp.89-92. ⟨10.1016/j.sab.2012.06.041⟩. ⟨hal-00732080⟩