Laser-induced breakdown spectroscopy (LIBS) is an emerging in situ analytical technique for material characterization. LIBS is a rapid and environmentally friendly technique, which requires little to no sample preparation, and can operate in hazardous environments and hard to reach places. The technique is currently being used in our laboratory for the quantification of rare earth elements (REEs) in complex matrix samples. In this study, strong and weak spectral lines of various REEs detected in geological samples were identified using the NIST database as a reference. Multivariate analysis was executed by developing partial least squares regression (PLS-R) models for the quantification of REEs. The study aims to develop a field deployable sensor for characterizing existing and new sources of rare earth elements.
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