Publication detail

Influence of baseline subtraction on laser-induced breakdown spectroscopic data

KÉPEŠ, E. POŘÍZKA, P. KLUS, J. MODLITBOVÁ, P. KAISER, J.

Original Title

Influence of baseline subtraction on laser-induced breakdown spectroscopic data

Type

journal article in Web of Science

Language

English

Original Abstract

Spectra acquired by laser-induced breakdown spectroscopy comprise both a valuable analyte signal and an undesired background signal originating from various sources. The latter is commonly suppressed, at least partially, by gating of the signal acquisition, or treated numerically during the data processing. The numerical treatment might lead to loss of information or introduction of spectral artefacts, depending on the applied methodology. Consequently, background subtraction might significantly influence both univariate and multivariate analysis of the LIBS data. While various baseline correction methods have recently been studied and compared for multivariate LIBS analysis, their influence on LIBS data remains unexplored. Therefore, the present work aims to elucidate the effects of numerical background estimation and subtraction on LIBS data in terms of limits of detection estimated by the signal-to-noise ratio method, considering several fundamentally different background estimation algorithms: polynomial fitting, heuristic estimation, wavelet smoothing, and non-parametric modelling. A threshold gate delay value was observed above which the numerical treatment of spectral background has to be done cautiously. In addition, it was found that the optimal measurement parameters and selection of the emission line yielding the best results dependon the planned spectral processing.

Keywords

Background estimation, background subtraction, laser-induced breakdown spectroscopy, limit of detection

Authors

KÉPEŠ, E.; POŘÍZKA, P.; KLUS, J.; MODLITBOVÁ, P.; KAISER, J.

Released

12. 10. 2018

Publisher

Royal Society of Chemistry

ISBN

1364-5544

Periodical

Journal of Analytical Atomic Spectrometry

Year of study

33

Number

-

State

United Kingdom of Great Britain and Northern Ireland

Pages from

2107

Pages to

2115

Pages count

9

URL

https://pubs.rsc.org/en/content/articlelanding/2018/ja/c8ja00209f#!divAbstract

BibTex

@article{BUT150455,
  author="Erik {Képeš} and Pavel {Pořízka} and Jakub {Klus} and Pavlína {Modlitbová} and Jozef {Kaiser}",
  title="Influence of baseline subtraction on laser-induced breakdown spectroscopic data",
  journal="Journal of Analytical Atomic Spectrometry",
  year="2018",
  volume="33",
  number="-",
  pages="2107--2115",
  doi="10.1039/C8JA00209F",
  issn="1364-5544",
  url="https://pubs.rsc.org/en/content/articlelanding/2018/ja/c8ja00209f#!divAbstract"
}