| |
|
|
| Registros recuperados : 14 | |
| 7. |  | COSTA, T. C. C.; FIDALGO, E. C. C.; UZÊDA, M. C.; ZARONI, M. J.; NAIME, U. J.; GUIMARÃES, S. P. Vulnerabilidade de sub-bacias bidrográficas do Estado do Rio de Janeiro. In: BERGALLO, H. de G.; FIDALGO, E. C. C.; ROCHA, C. F. D.; UZEDA, M. C.; COSTA, M. B.; ALVES, M. A. S.; VAN SLUYS, M.; SANTOS, M. A.; COSTA, T. C. e C. da; COZZOLINO, A. C. R. (Org.). Estratégias e ações para a conservação da biodiversidade no Estado do Rio de Janeiro. Rio de Janeiro: Instituto Biomas, 2009. p. 67-80| Biblioteca(s): Embrapa Agrobiologia. |
|   |
| 10. | | COSTA, T. C. e C. da; FIDALGO, E. C. C.; UZEDA, M. C.; ZARONI, M. J.; NAIME, U. J.; GUIMARÃES, S. P. Um indicador de vulnerabilidade para sub-bacias hidrográficas do estado do Rio de Janeiro Geografia, Londrina, v. 17, n. 2, jul.dez. 2008| Biblioteca(s): Embrapa Agrobiologia. |
| |
| 11. | | COSTA, T. C. e C. da; UZEDA, M. C.; FIDALGO, E. C. C.; LUMBRERAS, J. F.; ZARONI, M. J.; NAIME, U. J; GUIMARÃES, S. P. Vulnerabilidade ambiental em sub-bacias hidrográficas do Estado do Rio de Janeiro por meio de integração temática da perda do solo (USLE), variáveis morfométricas e o uso/cobertura da terra. In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 13., 2007, Florianópolis. Anais... Florianópolis: INPE, 2007. p. 2493-2500.| Biblioteca(s): Embrapa Milho e Sorgo; Embrapa Solos. |
|  |
| 12. | | COSTA, T. C. e C. da; UZEDA, M. C.; FIDALGO, E. C. C.; LUMBRERAS, J. F.; ZARONI, M. J.; NAIME, U. J.; GUIMARAES, S. P. Vulnerabilidade embiental em sub-hidrografias do Estado do Rio de Janeiro por meio de integração temática da perda de solo (USLE), variáveis morfométricas e o uso/cobertura da terra. In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 13., 2007, Florianópolis. São José dos Campos: INPE, 2007. p. 2493-2500.| Biblioteca(s): Embrapa Milho e Sorgo. |
| |
| 13. | | COSTA, T. C. e C. da; FIDALGO, E. C. C.; UZEDA, M. C.; ZARONI, M. J.; NAIME, U. J.; GUIMARÃES, S. P. Vulnerabilidade de sub-bacias hidrográficas do Estado do Rio de Janeiro. In: BERGALLO, H. de G.; FIDALGO, E. C. C.; ROCHA, C. F. D.; UZEDA, M. C.; COSTA, M. B.; ALVES, M. A. S.; VAN SLUYS, M.; SANTOS, M. A.; COSTA, T. C. e C. da; COZZOLINO, A. C. R. (Org.). Estratégias e ações para a conservação da biodiversidade no Estado do Rio de Janeiro. Rio de Janeiro: Instituto Biomas, 2009. cap. 5, p. 67-80.| Biblioteca(s): Embrapa Milho e Sorgo; Embrapa Solos. |
|  |
| 14. | | COSTA, T. C. e C. da; FIDALGO, E. C. C.; NAIME, U. J.; GUIMARÃES, S. P.; ZARONI, M. J.; UZEDA, M. C. Vulnerabilidade de sub-bacias hidrográficas por meio da equação universal de perda de solo e da integração de parâmetros morfométricos, topográficos, hidrológicos e de uso/cobertura da terra no estado do Rio de Janeiro, Brasil. Revista Ambiente & Agua, Taubaté, v. 4, n. 1, p. 93-116, 2009.| Biblioteca(s): Embrapa Agrobiologia; Embrapa Solos. |
| |
| Registros recuperados : 14 | |
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
|
Data corrente: |
11/01/2022 |
|
Data da última atualização: |
14/04/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 1 |
|
Autoria: |
CALIERO, C.; BIZZO, H. R.; RUBIOLO, P.; MARENGO, A.; GALLI, S.; ANDERSON, J. L.; SGORBINI, B.; BICCHI, C. |
|
Afiliação: |
CECILIA CAGLIERO, Università degli Studi di Torino; HUMBERTO RIBEIRO BIZZO, CTAA; PATRIZIA RUBIOLO, Università degli Studi di Torino; ARIANNA MARENGO; STEFANO GALLI, MEGA S. l. r.; JARED L. ANDERSON, Iowa State University; BARBARA SGORBINI, Università degli Studi di Torino; CARLO BICCHI, Università degli Studi di Torino. |
|
Título: |
Immobilization of phosphonium-based ionic liquid stationary phases extends their operative range to routine applications in the flavor, fragrance and natural product fields. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
Journal of Chromatography A, v. 1664, n. 462796, 2022. 12 p. + 2 p. supl. |
|
DOI: |
https://doi.org/10.1016/j.chroma.2021.462796 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Phosphonium-based ionic liquids (ILs) have proven to be successful stationary phases (SPs) for gaschromatography (GC) in several fields of application because of their unique selectivity and good chromatographic properties. This study focuses on the use of two ILs as GC SPs that are based on the phosphonium derivatives trihexyl(tetradecyl)phosphonium chloride ([P66614+] [Cl−]), and tri-hexyl(tetradecyl)phosphonium bis[(trifluoromethyl)sulfonyl]imide ([P66614+][NTf2−]), which have previously been shown to be complementary in terms of chromatographic selectivity and retention. Their application in routine analysis has been limited by their lower maximum allowable operating temperatures (MAOT) (200 °C for the [P66614+][Cl−] IL and 180 °C for [P66614+][NTf2−]), which restricts their use to samples that consist of analytes with relatively high volatility. A previous study carried out in the Authors’ laboratory focused on extending the use of the [P66614+][Cl−] IL SP to the analysis of samples with analytes of medium-to-low volatility by optimizing column characteristics and operative conditions. This study addresses the immobilization of both the [P66614+][Cl−] and [P66614+][NTf2−] ILs to the inner wall of fused silica columns to increase their MAOT under soft and hard reaction conditions. The resulting MAOT depended on more or less drastic immobilization conditions, and reached 220 °C for soft immobilization (So-Im) and 240 °C for hard immobilization (Ha-Im) in the [P66614+][Cl−] IL columns, and 200 °C for So-Im and 220° for Ha-Im in columns coated with the [P66614+] [NTf2−] IL. The influence of immobilization on the separation power and performance of all the columns has been evaluated using i) the Grob test, ii) a model mixture of 41 compounds of different polarity, structure, and with different organic functional groups representative of the flavor and fragrance field, iii) a standard mixture of 37 fatty acid methyl esters, iv) the peppermint essential oil, v) two mixtures of sesquiterpenic alcohols (farnesols and santalols), and vi) a standard mixture of 16 pesticides. These test samples were also used to demonstrate the complementarity of the two phosphonium-based IL SPs in terms of selectivity and retention. MenosPhosphonium-based ionic liquids (ILs) have proven to be successful stationary phases (SPs) for gaschromatography (GC) in several fields of application because of their unique selectivity and good chromatographic properties. This study focuses on the use of two ILs as GC SPs that are based on the phosphonium derivatives trihexyl(tetradecyl)phosphonium chloride ([P66614+] [Cl−]), and tri-hexyl(tetradecyl)phosphonium bis[(trifluoromethyl)sulfonyl]imide ([P66614+][NTf2−]), which have previously been shown to be complementary in terms of chromatographic selectivity and retention. Their application in routine analysis has been limited by their lower maximum allowable operating temperatures (MAOT) (200 °C for the [P66614+][Cl−] IL and 180 °C for [P66614+][NTf2−]), which restricts their use to samples that consist of analytes with relatively high volatility. A previous study carried out in the Authors’ laboratory focused on extending the use of the [P66614+][Cl−] IL SP to the analysis of samples with analytes of medium-to-low volatility by optimizing column characteristics and operative conditions. This study addresses the immobilization of both the [P66614+][Cl−] and [P66614+][NTf2−] ILs to the inner wall of fused silica columns to increase their MAOT under soft and hard reaction conditions. The resulting MAOT depended on more or less drastic immobilization conditions, and reached 220 °C for soft immobilization (So-Im) and 240 °C for hard immobilization (Ha-Im) in the [P66614+][Cl−... Mostrar Tudo |
|
Palavras-Chave: |
Column immobilization; Ionic liquid stationary phases; Operative conditions; Phosphonium-based ionic liquids. |
|
Thesaurus NAL: |
Gas chromatography. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
Marc: |
LEADER 03236naa a2200277 a 4500
001 2138990
005 2022-04-14
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.chroma.2021.462796$2DOI
100 1 $aCALIERO, C.
245 $aImmobilization of phosphonium-based ionic liquid stationary phases extends their operative range to routine applications in the flavor, fragrance and natural product fields.$h[electronic resource]
260 $c2022
520 $aPhosphonium-based ionic liquids (ILs) have proven to be successful stationary phases (SPs) for gaschromatography (GC) in several fields of application because of their unique selectivity and good chromatographic properties. This study focuses on the use of two ILs as GC SPs that are based on the phosphonium derivatives trihexyl(tetradecyl)phosphonium chloride ([P66614+] [Cl−]), and tri-hexyl(tetradecyl)phosphonium bis[(trifluoromethyl)sulfonyl]imide ([P66614+][NTf2−]), which have previously been shown to be complementary in terms of chromatographic selectivity and retention. Their application in routine analysis has been limited by their lower maximum allowable operating temperatures (MAOT) (200 °C for the [P66614+][Cl−] IL and 180 °C for [P66614+][NTf2−]), which restricts their use to samples that consist of analytes with relatively high volatility. A previous study carried out in the Authors’ laboratory focused on extending the use of the [P66614+][Cl−] IL SP to the analysis of samples with analytes of medium-to-low volatility by optimizing column characteristics and operative conditions. This study addresses the immobilization of both the [P66614+][Cl−] and [P66614+][NTf2−] ILs to the inner wall of fused silica columns to increase their MAOT under soft and hard reaction conditions. The resulting MAOT depended on more or less drastic immobilization conditions, and reached 220 °C for soft immobilization (So-Im) and 240 °C for hard immobilization (Ha-Im) in the [P66614+][Cl−] IL columns, and 200 °C for So-Im and 220° for Ha-Im in columns coated with the [P66614+] [NTf2−] IL. The influence of immobilization on the separation power and performance of all the columns has been evaluated using i) the Grob test, ii) a model mixture of 41 compounds of different polarity, structure, and with different organic functional groups representative of the flavor and fragrance field, iii) a standard mixture of 37 fatty acid methyl esters, iv) the peppermint essential oil, v) two mixtures of sesquiterpenic alcohols (farnesols and santalols), and vi) a standard mixture of 16 pesticides. These test samples were also used to demonstrate the complementarity of the two phosphonium-based IL SPs in terms of selectivity and retention.
650 $aGas chromatography
653 $aColumn immobilization
653 $aIonic liquid stationary phases
653 $aOperative conditions
653 $aPhosphonium-based ionic liquids
700 1 $aBIZZO, H. R.
700 1 $aRUBIOLO, P.
700 1 $aMARENGO, A.
700 1 $aGALLI, S.
700 1 $aANDERSON, J. L.
700 1 $aSGORBINI, B.
700 1 $aBICCHI, C.
773 $tJournal of Chromatography A$gv. 1664, n. 462796, 2022. 12 p. + 2 p. supl.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agroindústria de Alimentos (CTAA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
