Fayyaz Amir, Asghar Haroon, Alshehri A M, Alrebdi Tahani A
National Centre for Physics, Quaid-i-Azam University Campus, 45320 Islamabad, Pakistan.
Department of Physics, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.
Heliyon. 2023 Feb 23;9(3):e13957. doi: 10.1016/j.heliyon.2023.e13957. eCollection 2023 Mar.
In the present study, the immediate detection of rare-earth elements (REEs) in phosphorite deposits has been reported using laser-induced breakdown spectroscopy (LIBS). Numerous emission lines corresponding to the REEs such as lanthanum (La), cerium (Ce), neodymium (Nd), samarium (Sm), and ytterbium (Yb), have been detected in the emission spectra of phosphorite-induced plasma plume. For the quantitative analysis, we employed the calibration-free LIBS (CF-LIBS), and Energy Dispersive X-ray (EDX) spectroscopy techniques. The results obtained using the CF-LIBS technique show excellent agreement with that obtained by EDX. Besides principal component analysis (PCA) was employed by incorporating the LIBS spectral data of rare earth phosphorite rocks samples containing La, Ce, Nd, Sm, and Yb emission lines. The first three PCs were observed using LIBS spectral data set showing a covariance (interpretation rate) up to 76.3%. This study suggests that LIBS yields a quick and very reliable qualitative and quantitative analysis of REEs in any geological ore sample.
在本研究中，已报道使用激光诱导击穿光谱法（LIBS）对磷块岩矿床中的稀土元素（REEs）进行即时检测。在磷块岩诱导的等离子体羽流的发射光谱中，已检测到许多对应于稀土元素的发射线，如镧（La）、铈（Ce）、钕（Nd）、钐（Sm）和镱（Yb）。对于定量分析，我们采用了无校准LIBS（CF-LIBS）和能量色散X射线（EDX）光谱技术。使用CF-LIBS技术获得的结果与EDX获得的结果显示出极好的一致性。此外，通过纳入含有La、Ce、Nd、Sm和Yb发射线的稀土磷块岩岩石样品的LIBS光谱数据，采用了主成分分析（PCA）。使用LIBS光谱数据集观察到前三个主成分，其协方差（解释率）高达76.3%。这项研究表明，LIBS能够对任何地质矿石样品中的稀土元素进行快速且非常可靠的定性和定量分析。
