Rapid quantitative analysis of trace elements in plutonium alloys using a handheld laser-induced breakdown spectroscopy (LIBS) device coupled with chemometrics and machine learning
Document Type
Article
Publication Date
Summer 6-30-2021
Abstract
We present the first reported quantification of trace elements in plutonium via a portable laser-induced breakdown spectroscopy (LIBS) device and demonstrate the use of chemometric analysis to enhance the handheld device's sensitivity and precision. Quantification of trace elements such as iron and nickel in plutonium metal via LIBS is a challenging problem due to the complex nature of the plutonium optical emission spectra. While rapid analysis of plutonium alloys has been demonstrated using portable LIBS devices, such as the SciAps Z300, their detection limits for trace elements are severely constrained by their achievable pulse power and length, light collection optics, and detectors. In this paper, analytical methods are evaluated as a means to circumvent the detection constraints. Three chemometric methods often used in analytical spectroscopy are evaluated; principal component regression, partial least-squares regression, and artificial neural networks. These models are evaluated based on goodness-of-fit metrics, root mean-squared error, and their achievable limits of detection (LoDs). Partial least squares proved superior for determining content of iron and nickel in plutonium metal, yielding LoDs of 15 and 20 ppm, respectively. These results of identifying the undesirable trace elements in plutonium components are critical for applications such as fabricating radioisotope thermoelectric generators or nuclear fuel.
DOI
10.1039/D1AY00826A
Source Publication
Analytical Methods
Recommended Citation
Rao, A. P., Jenkins, P. R., Vu, D. M., Auxier II, J. D., Patnaik, A. K., & Shattan, M. B. (2021). Rapid quantitative analysis of trace elements in plutonium alloys using a handheld laser-induced breakdown spectroscopy (LIBS) device coupled with chemometrics and machine learning. Analytical Methods. https://doi.org/10.1039/D1AY00826A
Comments
©2021 Royal Society of Chemistry.
The "Link to Full Text" on this page opens the CHORUS-furnished manuscript ("author version") of the article. The final version of record in Analytical Methods is available to subscribers from the DOI in the citation below.