Influence of titania matrix on retention behaviour in reversed-phase liquid chromatography

Tani, Kazue; Suzuki, Y.

doi:10.1016/0021-9673(95)00456-4

Cited by 62 publications

(35 citation statements)

References 9 publications

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“…The silanization process was based on the methodology used by Tani and Suzuki (1996). After the acid treatment, the activation of the silica with octyl groups consisted in preparing a suspension containing 1 g of treated dry silica, 20 ml of a mixture of toluene/octyl(triethoxy)silane in the volume ratio 1:10.…”

Section: Preparation Of Ocsil/calbmentioning

confidence: 99%

NANOBIOCATALYTIC SYSTEMS BASED ON LIPASE-Fe3O4 AND CONVENTIONAL SYSTEMS FOR ISONIAZID SYNTHESIS: A COMPARATIVE STUDY

Costa

Souza

Fechine

et al. 2016

Braz. J. Chem. Eng.

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-Superparamagnetic nanomaterials have attracted interest in many areas due to the high saturation magnetization and surface area. For enzyme immobilization, these properties favor the enzyme-support contact during the immobilization reaction and easy separation from the reaction mixture by use of low-cost magnetic processes. Iron oxide magnetic nanoparticles (Fe3O4, MNPs), produced by the co-precipitation method, functionalized with 3-aminopropyltriethoxysilane (APTES) and glutaraldehyde (GLU), were evaluated as a solid support for Candida antarctica lipase B (CALB) immobilization. The nanomagnetic derivative (11nm) obtained after CALB immobilization (MNPs/APTES/GLU/CALB) was evaluated as biocatalyst in isoniazide (INH) synthesis using ethyl isonicotinate (INE) and hydrazine hydrate (HID) as substrates, in 1,4-dioxane. The results showed that MNPs/APTES/CALB had a similar performance when compared to a commercial enzyme Novozym 435, showing significant advantages over other biocatalysts, such as Rhizhomucor miehei lipase (RML) and CALB immobilized on non-conventional, low-cost, chitosan-based supports.

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Section: Preparation Of Ocsil/calbmentioning

confidence: 99%

NANOBIOCATALYTIC SYSTEMS BASED ON LIPASE-Fe3O4 AND CONVENTIONAL SYSTEMS FOR ISONIAZID SYNTHESIS: A COMPARATIVE STUDY

Costa

Souza

Fechine

et al. 2016

Braz. J. Chem. Eng.

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“…Both of these aimed at obtaining stationary phases with improved chemical stability over a wider pH range and, therefore, making the separation of a wider range of analytes, including macromolecules and basic compounds, possible. 10 Several materials were evaluated as possible substitutes for silica, with emphasis on organic polymers [11][12][13] and some inorganic oxides such as alumina, [14][15][16] titania [16][17][18] and zirconia. 16,[19][20][21][22] The parameter used by chromatographers for the selection of these materials as chromatographic supports was their chemical stability over a wider pH range, when compared with silica.…”

Section: Chemically Bonded Stationary Phasesmentioning

confidence: 99%

State-of-the-art in immobilized polymer stationary phases for high-performance liquid chromatography

Faria¹,

Jardim²

2009

J. Braz. Chem. Soc.

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O aumento da estabilidade química e a redução da alta atividade de grupos residuais têm sido, nas últimas quatro décadas, os principais focos de pesquisas na preparação de fases estacionárias para cromatografia líquida de alta eficiência na modalidade de fase reversa (CLAE-FR). Novas e eficientes estratégias de modificação da superfície da sílica e a introdução de novos materiais como suportes cromatográficos têm minimizado estas limitações e possibilitado uma crescente popularização da CLAE-FR. Neste trabalho será apresentada uma visão geral do estado da arte de uma das estratégias de preparo de fases estacionárias que vem contornando tais limitações da CLAE-FR; as fases estacionárias baseadas na imobilização de polímeros orgânicos pré-sintetizados sobre partículas de sílica e sílica metalizada (zirconizada e titanizada). Uma consideração especial será dada ao desenvolvimento destas fases estacionárias ocorrido no Brasil nos últimos 15 anos.Increasing stability and reducing the high activity of residual groups from stationary phases have been the main focuses of research on the preparation of reversed-phase high-performance liquid chromatography (RP-HPLC) phases over the last four decades. New and more efficient strategies for modifying the silica surface as well as the introduction of new chromatographic supports have minimized these effects and have enabled the increasing popularization of RP-HPLC. In this paper, an overview will be given of the state-of-the-art in stationary phases for RP-HPLC based on immobilization of pre-synthesized organic polymers on both silica and metalized-silica supports. Special consideration is given to the development of HPLC stationary phases in Brazil in the past 15 years.

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“…TiO2 particles were prepared based on a previous study, 10 described as follows. First, 30 mL of a 6.0 × 10 -5 M HCl solution, 1500 g of 2-propanol and 900 g of glycerol were placed in a beaker and mixed for 5 min under ultrasonication.…”

Section: Preparation Of Tio2 Particles For Photo Catalystsmentioning

confidence: 99%

Rapid Temperature-Programmed Separation of Carbon Monoxide and Carbon Dioxide on a Packed Capillary Column in Gas Chromatography: Application to the Evaluation of Photocatalytic Activity of TiO2

et al. 2013

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Carbon monoxide (CO) and carbon dioxide (CO2) were determined in a conventional capillary gas chromatography-flame ionization detector (GC-FID) by introducing a packed-capillary column and a methanizer. Due to good compatibility with rapid temperature-programmed operation of the packed capillary column, several volatile compounds, including CO and CO2, were rapidly eluted along with satisfactory resolution and sample loading capacity. The limit of quantifications of CO and CO2 were 5 and 3 ppm, respectively, with an injection volume of 0.5 mL. The developed system was then successfully applied to evaluating the photocatalytic decomposition of volatile organic compounds on titanium dioxide (TiO2).

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Influence of titania matrix on retention behaviour in reversed-phase liquid chromatography

Cited by 62 publications

References 9 publications

NANOBIOCATALYTIC SYSTEMS BASED ON LIPASE-Fe3O4 AND CONVENTIONAL SYSTEMS FOR ISONIAZID SYNTHESIS: A COMPARATIVE STUDY

NANOBIOCATALYTIC SYSTEMS BASED ON LIPASE-Fe3O4 AND CONVENTIONAL SYSTEMS FOR ISONIAZID SYNTHESIS: A COMPARATIVE STUDY

State-of-the-art in immobilized polymer stationary phases for high-performance liquid chromatography

Rapid Temperature-Programmed Separation of Carbon Monoxide and Carbon Dioxide on a Packed Capillary Column in Gas Chromatography: Application to the Evaluation of Photocatalytic Activity of TiO2

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