Journal ArticleDOI
Laser-induced breakdown spectroscopy of steel: a comparison of univariate and multivariate calibration methods.
TLDR
The performance of partial least squares is on par with using iron as an internal standard but has the key advantage that it can be applied to samples where the concentrations of all elements are unknown.Abstract:
Laser-induced breakdown spectroscopy (LIBS) was carried out on twenty-three low to high alloy steel samples to quantify their concentrations of chromium, nickel, and manganese. LIBS spectral data were correlated to known concentrations of the samples and three calibration methods were compared. A standard LIBS calibration technique using peak area integration normalized by an internal standard was compared to peak area integration normalized by total light and the multivariate statistical technique of partial least squares. For the partial least squares analysis, the PLS-1 algorithm was used, where a predictive model is generated for each element separately. Partial least squares regression coefficients show that the algorithm correctly identifies the atomic emission peaks of interest for each of the elements. Predictive capabilities of each calibration approach were quantified by calculating the standard and relative errors of prediction. The performance of partial least squares is on par with using iron as an internal standard but has the key advantage that it can be applied to samples where the concentrations of all elements are unknown.read more
Citations
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Journal ArticleDOI
Twelve different types of data normalization for the proposition of classification, univariate and multivariate regression models for the direct analyses of alloys by laser-induced breakdown spectroscopy (LIBS)
TL;DR: In this paper, the authors applied laser-induced breakdown spectroscopy (LIBS) for the direct analysis of 80 metal samples (alloys and steel) for multivariate and univariate regression models, aiming at the determination of 10 analytes (Al, Cr, Cu, Fe, Mn, Mo, Ni, Ti, V and Zn).
Journal ArticleDOI
Recent advances in laser-induced breakdown spectroscopy quantification: From fundamental understanding to data processing
TL;DR: Methods for raw signal improvement including sample preparation, system optimization, and especially plasma modulation, which modulates the laser-induced plasma evolution process for higher signal repeatability and signal-to-noise ratio, were reviewed and discussed.
Journal ArticleDOI
A hybrid quantification model and its application for coal analysis using laser induced breakdown spectroscopy
TL;DR: In this article, the authors proposed a set method to improve both precision (sample-to-sample reproducibility) and accuracy for laser induced breakdown spectroscopy (LIBS) quantification.
Journal ArticleDOI
Novel low-intensity phase-selective laser-induced breakdown spectroscopy of TiO2 nanoparticle aerosols during flame synthesis
Yiyang Zhang,Yiyang Zhang,Gang Xiong,Shuiqing Li,Zhizhong Dong,Steven G. Buckley,Stephen D. Tse +6 more
TL;DR: In this article, a low-intensity laser-induced breakdown spectroscopy (LIBS) was employed to conduct an in situ study on swirl flame synthesis of TiO2 nanoparticles.
Journal ArticleDOI
Extraction of compositional and hydration information of sulfates from laser-induced plasma spectra recorded under Mars atmospheric conditions — Implications for ChemCam investigations on Curiosity rover
P. Sobron,Alian Wang,F. Sobron +2 more
TL;DR: In this paper, an automated pre-processing sequence of algorithms for converting a series of LIBS spectra (typically 125) recorded from a single target into a reliable SNR-enhanced spectrum; a dedicated routine to quantify its spectral features; and a set of calibration curves using standard hydrous and multication sulfates.
References
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Journal ArticleDOI
Partial least-squares methods for spectral analyses. 1. Relation to other quantitative calibration methods and the extraction of qualitative information
TL;DR: Partial least squares (PLS) as discussed by the authors is one of the most popular spectral analysis methods for spectral analysis, which is composed of a series of simpllfled classical least-squares (CLS) and ILS steps.
Book
Handbook of laser-induced breakdown spectroscopy
TL;DR: In this article, the authors present an overview of the current state of the art in the field of laser-induced breakdown spectroscopy (LIBS) and its application in various applications.
BookDOI
Handbook of Laser-Induced Breakdown Spectroscopy: Cremers/Handbook of Laser-induced Breakdown Spectroscopy
Journal ArticleDOI
Laser-induced breakdown spectrometry — applications for production control and quality assurance in the steel industry
Reinhard Noll,Holger Bette,Adriane Brysch,Marc Oliver Kraushaar,Ingo Mönch,László Péter,Volker Sturm +6 more
TL;DR: In this paper, a laser-induced breakdown spectrometry (LIBS) was used to detect light and heavy elements in slag samples in the steel making and processing industry.
Journal ArticleDOI
Multivariate analysis of remote laser-induced breakdown spectroscopy spectra using partial least squares, principal component analysis, and related techniques
TL;DR: In this paper, Principal Component Analysis and Soft Independent Modeling of Class Analogy are employed to generate a model and predict the rock type of the samples, which appear to exploit the matrix effects associated with the chemistries of these 18 samples.
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