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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
14/04/2020 |
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Data da última atualização: |
11/12/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BABOS, D. V.; GARCIA, R. H. S.; COLNAGO, L. A. |
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Afiliação: |
LUIZ ALBERTO COLNAGO, CNPDIA. |
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Título: |
A simple, rapid, green and non-destructive 19F time-domain NMR method for directly fluorine determination in powder of mineral supplements for cattle. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Microchemical Journal, n.153, a. 104416, 2020. |
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ISSN: |
0026-065X |
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DOI: |
10.1016/j.microc.2019.104416 |
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Idioma: |
Inglês |
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Conteúdo: |
A simple, rapid, green and non-destructive 19 F time-domain nuclear magnetic resonance (TD NMR) method for fluorine determination directly in the powder of cattle mineral supplements is presented. The measurements were performed in a 0.49 T (18.76 MHz for 19 F) spectrometer using a 10 mm probe with 10 μs dead time. Standard samples from 0 to 21,700 mg kg −1 F were prepared diluting the appropriate amount of BaF2 in the salts Na 2CO 3 : NaCl (1:1 w/w) that are normally used in the mineral supplements. The intensity of the free induction signal (FID), measured at 10 μs after 90° pulse and the fluorine content was used in an univariate model, with a limit of detection of 388 mg kg −1 F. A partial least square model was also built using all FID data points and Fluorine content and yield a standard error of validation of 199 mg kg −1 F. Accuracy was assessed by addition / recovery tests the analysis for two mineral supplements for cattle with trueness from 81 to 120%. Therefore, this is a green (non-chemical waste), simple (minimal sample preparation), fast (20 min) alternative method for determination of F in cattle mineral supplements. |
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Palavras-Chave: |
Direct solid analysis; Fluorine determination; Mineral supplements for cattle; Time domain nuclear magnetic resonance. |
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Categoria do assunto: |
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Marc: |
LEADER 01920naa a2200217 a 4500
001 2121651
005 2024-12-11
008 2020 bl uuuu u00u1 u #d
022 $a0026-065X
024 7 $a10.1016/j.microc.2019.104416$2DOI
100 1 $aBABOS, D. V.
245 $aA simple, rapid, green and non-destructive 19F time-domain NMR method for directly fluorine determination in powder of mineral supplements for cattle.$h[electronic resource]
260 $c2020
520 $aA simple, rapid, green and non-destructive 19 F time-domain nuclear magnetic resonance (TD NMR) method for fluorine determination directly in the powder of cattle mineral supplements is presented. The measurements were performed in a 0.49 T (18.76 MHz for 19 F) spectrometer using a 10 mm probe with 10 μs dead time. Standard samples from 0 to 21,700 mg kg −1 F were prepared diluting the appropriate amount of BaF2 in the salts Na 2CO 3 : NaCl (1:1 w/w) that are normally used in the mineral supplements. The intensity of the free induction signal (FID), measured at 10 μs after 90° pulse and the fluorine content was used in an univariate model, with a limit of detection of 388 mg kg −1 F. A partial least square model was also built using all FID data points and Fluorine content and yield a standard error of validation of 199 mg kg −1 F. Accuracy was assessed by addition / recovery tests the analysis for two mineral supplements for cattle with trueness from 81 to 120%. Therefore, this is a green (non-chemical waste), simple (minimal sample preparation), fast (20 min) alternative method for determination of F in cattle mineral supplements.
653 $aDirect solid analysis
653 $aFluorine determination
653 $aMineral supplements for cattle
653 $aTime domain nuclear magnetic resonance
700 1 $aGARCIA, R. H. S.
700 1 $aCOLNAGO, L. A.
773 $tMicrochemical Journal$gn.153, a. 104416, 2020.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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