Xavier Cama-Moncunill
Sampling effects on the quantification of sodium content in infant formula using laser induced breakdown spectroscopy (LIBS)
Cama-Moncunill, Xavier; Markiewicz-Keszycka, Maria; Cama-Moncunill, Raquel; Dixit, Yash; Casado-Gavalda, Maria P.; Cullen, P.J.; Sullivan, Carl
Authors
Maria Markiewicz-Keszycka
Raquel Cama-Moncunill
Yash Dixit
Maria P. Casado-Gavalda
P.J. Cullen
Carl Sullivan
Abstract
Laser-induced breakdown spectroscopy (LIBS) was employed to predict the sodium content of infant formula (IF) over the range 0.5–4 mg Na g−1. Calibration models were built using partial least squares regression (PLS), correlating the LIBS spectral data with reference Na content quantified by atomic absorption spectroscopy (AAS). The main aim of this study was to demonstrate the ability of LIBS as a rapid tool for quantifying sodium in IF, but also to explore strategies concerning the acquisition and pre-processing of LIBS spectra. A range of different pre-processing techniques, measuring depths (repetition of laser shots) and accumulations were conducted and evaluated in terms of PLS performance. The best calibration model was developed using the third-layer spectra normalised by the H I 656.29 nm emission line, yielding a coefficient of determination (R2) of 0.93, and root-mean-square errors (RMSE) of 0.37 and 0.13 mg g−1 for cross-validation and validation, respectively.
Citation
Cama-Moncunill, X., Markiewicz-Keszycka, M., Cama-Moncunill, R., Dixit, Y., Casado-Gavalda, M. P., Cullen, P., & Sullivan, C. (2018). Sampling effects on the quantification of sodium content in infant formula using laser induced breakdown spectroscopy (LIBS). International Dairy Journal, 85, https://doi.org/10.1016/j.idairyj.2018.04.014
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 28, 2018 |
Online Publication Date | Jun 2, 2018 |
Publication Date | Oct 31, 2018 |
Deposit Date | Jul 5, 2018 |
Publicly Available Date | Mar 28, 2024 |
Journal | International Dairy Journal |
Print ISSN | 0958-6946 |
Electronic ISSN | 1879-0143 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 85 |
DOI | https://doi.org/10.1016/j.idairyj.2018.04.014 |
Keywords | LIBS; Infant formula; Sodium; Partial least squares regression; Sampling |
Public URL | https://nottingham-repository.worktribe.com/output/950721 |
Publisher URL | https://www.sciencedirect.com/science/article/pii/S0958694618301298?via%3Dihub |
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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