Remote Quantitative Analysis of Minerals Based on Multispectral Line-Calibrated Laser-Induced Breakdown Spectroscopy (LIBS). Issue 10 (October 2014)

• Record Type: Journal Article
• Authors: Wan, Xiong; Wang, Peng
• Is Part Of: Applied spectroscopy. Volume 68:Issue 10(2014)
• Page Start: 1132
• Page End: 1136
• Publication Date: 2014-10
• Subjects: Laser-induced breakdown spectroscopy -- LIBS -- Remote detection -- Mineral detection -- Quantitative analysis; Spectrum analysis -- Periodicals; 543.505
• DOI: 10.1366/13-07203
• Languages: English
• ISSNs: 0003-7028

Abstract

Laser-induced breakdown spectroscopy (LIBS) is a feasible remote sensing technique used for mineral analysis in some unapproachable places where in situ probing is needed, such as analysis of radioactive elements in a nuclear leak or the detection of elemental compositions and contents of minerals on planetary and lunar surfaces. Here a compact custom 15 m focus optical component, combining a six times beam expander with a telescope, has been built, with which the laser beam of a 1064 nm Nd; YAG laser is focused on remote minerals. The excited LIBS signals that reveal the elemental compositions of minerals are collected by another compact single lens-based signal acquisition system. In our remote LIBS investigations, the LIBS spectra of an unknown ore have been detected, from which the metal compositions are obtained. In addition, a multi-spectral line calibration (MSLC) method is proposed for the quantitative analysis of elements. The feasibility of the MSLC and its superiority over a single-wavelength determination have been confirmed by comparison with traditional chemical analysis of the copper content in the ore.