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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: |
28/11/2023 |
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Data da última atualização: |
15/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BORDUCHI, L. C. L.; MENEGATTI, C. R.; MILORI, D. M. B. P.; IZÁRIO FILHO, H. J.; VILLAS-BOAS, P. R. |
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Afiliação: |
Universidade de São Paulo; Universidade de São Paulo; DEBORA MARCONDES BASTOS PEREIRA, CNPDIA; Universidade de São Paulo; PAULINO RIBEIRO VILLAS BOAS, CNPDIA. |
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Título: |
Application of one-point calibration LIBS for quantification of analytes in samples with distinct matrix characteristics: a case study with Hg. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Journal of Analytical Atomic Spectrometry, v. 38, n. 5, 2023. |
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Páginas: |
1155 - 1163 |
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DOI: |
10.1039/d2ja00399f |
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Idioma: |
Inglês |
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Conteúdo: |
Laser-induced breakdown spectroscopy (LIBS) is a powerful analytical technique for elemental analysis, but matrix effects can significantly affect its accuracy. In this work, we propose the use of calibration-free LIBS (CF-LIBS) with the one-point calibration (OPC) method to reduce matrix effects in the quantification of mercury (Hg) for seven soil and eleven landfill leachate samples, with Hg concentration ranging from 50 to 1000 mg kg−1 . To improve sensitivity, we employed a double-pulse LIBS system with parameters optimized for each of the two sample matrices. A single soil sample was used to calibrate the OPC factors, which were then applied to the CF-LIBS calculations for the other samples. Using CF-LIBS corrected with the OPC method, we achieved an average error of 4.3% in the quantification of Hg for the two sample sets. This result indicates that these methods have the potential not only to reduce matrix effects but also to compensate for variations in LIBS system optimization for either matrix (soils and leachates) in the quantification of Hg. Therefore, the combination of these methods opens new possibilities for LIBS analyses, where the system can be optimized for each element and sample matrix, and the quantification can be performed with CF-LIBS, as long as the requirements for local thermodynamic equilibrium are fulfilled. Further studies with other elements, matrices, and measurement conditions are needed to validate and expand these findings. |
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Palavras-Chave: |
LIBS systems; Thermodynamic equilibrium. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02221naa a2200217 a 4500
001 2158827
005 2024-01-15
008 2023 bl uuuu u00u1 u #d
024 7 $a10.1039/d2ja00399f$2DOI
100 1 $aBORDUCHI, L. C. L.
245 $aApplication of one-point calibration LIBS for quantification of analytes in samples with distinct matrix characteristics$ba case study with Hg.$h[electronic resource]
260 $c2023
300 $a1155 - 1163
520 $aLaser-induced breakdown spectroscopy (LIBS) is a powerful analytical technique for elemental analysis, but matrix effects can significantly affect its accuracy. In this work, we propose the use of calibration-free LIBS (CF-LIBS) with the one-point calibration (OPC) method to reduce matrix effects in the quantification of mercury (Hg) for seven soil and eleven landfill leachate samples, with Hg concentration ranging from 50 to 1000 mg kg−1 . To improve sensitivity, we employed a double-pulse LIBS system with parameters optimized for each of the two sample matrices. A single soil sample was used to calibrate the OPC factors, which were then applied to the CF-LIBS calculations for the other samples. Using CF-LIBS corrected with the OPC method, we achieved an average error of 4.3% in the quantification of Hg for the two sample sets. This result indicates that these methods have the potential not only to reduce matrix effects but also to compensate for variations in LIBS system optimization for either matrix (soils and leachates) in the quantification of Hg. Therefore, the combination of these methods opens new possibilities for LIBS analyses, where the system can be optimized for each element and sample matrix, and the quantification can be performed with CF-LIBS, as long as the requirements for local thermodynamic equilibrium are fulfilled. Further studies with other elements, matrices, and measurement conditions are needed to validate and expand these findings.
653 $aLIBS systems
653 $aThermodynamic equilibrium
700 1 $aMENEGATTI, C. R.
700 1 $aMILORI, D. M. B. P.
700 1 $aIZÁRIO FILHO, H. J.
700 1 $aVILLAS-BOAS, P. R.
773 $tJournal of Analytical Atomic Spectrometry$gv. 38, n. 5, 2023.
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