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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
04/07/2023 |
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Data da última atualização: |
29/07/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VILLAS-BOAS, P. R.; BORDUCHI, L. C. L. |
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Afiliação: |
PAULINO RIBEIRO VILLAS BOAS, CNPDIA; UNIVERSIDADE DE SÃO PAULO. |
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Título: |
A statistical definition of limit of detection for calibration-free laser-induced breakdown spectroscopy. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Spectrochimica Acta Part B: Atomic Spectroscopy, v. 205, 106690, 2023. |
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Páginas: |
1 - 9 |
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ISSN: |
0584-8547 |
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DOI: |
https://doi.org/10.1016/j.sab.2023.106690 |
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Idioma: |
Inglês |
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Conteúdo: |
Laser-Induced Breakdown Spectroscopy (LIBS) is a fast and powerful technique for elemental analysis, but its high limit of detection (LOD) can limit its use, particularly in the analyses of trace elements. Although the LOD has been established for calibration curves and multivariate models in LIBS, it remains undefined for calibration free LIBS (CF-LIBS). In this work, a statistical LOD definition is proposed for CF-LIBS based on the density of emitters, plasma parameters, and measurement uncertainties. The emission line intensities are assumed to have uncertainties that can be estimated by the standard deviation of the background signal. The LOD proposed in this work is determined through the propagation of uncertainties applied to CF-LIBS calculations, and is shown to depend on plasma temperature and emission line properties. It was validated using carbon and calcium in sodium chloride samples, yielding values comparable to those obtained with the LOD definition for calibration curves. In addition to allowing for LOD estimation in CF-LIBS, the proposed expression also provides a sound and thorough LOD definition for LIBS quantitative analyses. |
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Palavras-Chave: |
Boltzmann plot; Calibration-free; Laser-induced breakdown spectroscopy; Limit of detection. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01888naa a2200217 a 4500
001 2154791
005 2024-07-29
008 2023 bl uuuu u00u1 u #d
022 $a0584-8547
024 7 $ahttps://doi.org/10.1016/j.sab.2023.106690$2DOI
100 1 $aVILLAS-BOAS, P. R.
245 $aA statistical definition of limit of detection for calibration-free laser-induced breakdown spectroscopy.$h[electronic resource]
260 $c2023
300 $a1 - 9
520 $aLaser-Induced Breakdown Spectroscopy (LIBS) is a fast and powerful technique for elemental analysis, but its high limit of detection (LOD) can limit its use, particularly in the analyses of trace elements. Although the LOD has been established for calibration curves and multivariate models in LIBS, it remains undefined for calibration free LIBS (CF-LIBS). In this work, a statistical LOD definition is proposed for CF-LIBS based on the density of emitters, plasma parameters, and measurement uncertainties. The emission line intensities are assumed to have uncertainties that can be estimated by the standard deviation of the background signal. The LOD proposed in this work is determined through the propagation of uncertainties applied to CF-LIBS calculations, and is shown to depend on plasma temperature and emission line properties. It was validated using carbon and calcium in sodium chloride samples, yielding values comparable to those obtained with the LOD definition for calibration curves. In addition to allowing for LOD estimation in CF-LIBS, the proposed expression also provides a sound and thorough LOD definition for LIBS quantitative analyses.
653 $aBoltzmann plot
653 $aCalibration-free
653 $aLaser-induced breakdown spectroscopy
653 $aLimit of detection
700 1 $aBORDUCHI, L. C. L.
773 $tSpectrochimica Acta Part B: Atomic Spectroscopy$gv. 205, 106690, 2023.
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