Measuring Lanthanide Concentrations in Molten Salt Using Laser-Induced Breakdown Spectroscopy (LIBS)

被引：31
作者：
Weisberg, Arel [1 ]
Lakis, Rollin E. [2 ]
Simpson, Michael F. [3 ]
Horowitz, Leo [1 ]
Craparo, Joseph [1 ]
机构：
[1] Energy Res Co, Plainfield, NJ 07062 USA
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[3] Univ Utah, Dept Met Engn, Salt Lake City, UT 84112 USA
来源：
APPLIED SPECTROSCOPY | 2014年 / 68卷 / 09期
关键词：
Laser-induced breakdown spectroscopy; LIBS; Lanthanides; Lithium potassium chloride salt; Molten salt; Europium; Praseodymium; AQUEOUS-SOLUTION; INDUCED PLASMA; IN-SITU; URANIUM; STEEL; SPECTROMETRY; RESIDUES; SAMPLES; SENSOR; ALLOY;
D O I：
10.1366/13-07390
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The versatility of laser-induced breakdown spectroscopy (LIBS) as an analytical method for high-temperature applications was demonstrated through measurement of the concentrations of the lanthanide elements europium (Eu) and praseodymium (Pr) in molten eutectic lithium chloride-potassium chloride (LiCI-KCI) salts at a temperature of 500 degrees C. Laser pulses (1064 nm, 7 ns, 120 mJ/pulse) were focused on the top surface of the molten salt samples in a laboratory furnace under an argon atmosphere, and the resulting LIBS signals were collected using a broadband Echelle-type spectrometer. Partial least squares (PLS) regression using leave-one-sample-out cross-validation was used to quantify the concentrations of Eu and Pr in the samples. The root mean square error of prediction (RMSEP) for Eu was 0.13% (absolute) over a concentration range of 0-3.01%, and for Pr was 0.13% (absolute) over a concentration range of 0-1.04%.
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收藏
页码：937 / 948
页数：12
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