Separation of branched polystyrene by comprehensive two-dimensional liquid chromatography

Im, Kyuhyun; Kim, Young‐Tak; Chang, Taihyun; Lee, Kwan‐Young; Choi, Nami

doi:10.1016/j.chroma.2005.11.050

Cited by 81 publications

(54 citation statements)

References 33 publications

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“…This is probably due to the fact that comprehensive 2D LC is a relatively new technique, and that its capabilities in this specific field are still unexplored. Up to now, this technique has been mainly used in the field of polymers [20,[156][157][158][159][160][161][162] as well as biological samples. [45][46][47][48][49][50][51][52][53][54][55][56][57][58]134,[163][164][165] …”

Section: Discussionmentioning

confidence: 99%

Multidimensional Liquid Chromatographic Separations Applied to the Analysis of Food Samples

Dugo

Kumm

Cacciola

et al. 2008

Journal of Liquid Chromatography & Related Technologies

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Nowadays, multidimensional techniques occupy an expanding niche in separation science, being strong evidence that one-dimensional systems are by themselves inadequate, especially when challenged with highly complex samples. No exceptions are foodstuffs: analytical multidimensional methods not only allow the qualitative and quantitative determination of the main compounds, but can also be selective and sensitive enough to permit the determination of minor components. The present review gives an overview of the application of three main types of multidimensional separations, off-line, on-line=heart-cutting, and comprehensive liquid chromatography, for the analysis of food and beverages. The principles, advantages, and disadvantages of each approach are briefly described.

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Section: Discussionmentioning

confidence: 99%

Multidimensional Liquid Chromatographic Separations Applied to the Analysis of Food Samples

Dugo

Kumm

Cacciola

et al. 2008

Journal of Liquid Chromatography & Related Technologies

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“…Liquid chromatography is widely used for the analysis and characterization of cyclic polymers, as well as for the separation of cyclic products from linear precursors [9][10][11][12][13][14][15][16][17]. Many reports describing successful chromatographic analysis of branched, and star polymers have appeared as well [18][19][20][21][22][23]. Mostly the systems were studied with strong correlations between topology and other molecular characteristics of polymers.…”

Section: Introductionmentioning

confidence: 98%

“…Another correlation is used when specific groups differing in their adsorption properties from regular chain units are present in branched polymers (such groups can be situated on the chain ends or/and in the branch-points). There are several successful attempts to use the liquid chromatography for the characterization of such star-shaped and branched polymers [21][22][23]. In fact, in such cases chromatography separates polymers not by topology itself, but by the property which is correlated with chain topology (by molar mass or by the number of specific groups).…”

Section: Introductionmentioning

confidence: 99%

Simulating chromatographic separation of topologically different polymers

Горбунов

Vakhrushev

2010

Procedia Chemistry

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Chromatography which is sensitive to the sizes of macromolecules and to their adsorption serves as an appropriate method to separate complex polymers. Unfortunately, the molar mass also influences the chromatographic retention, thus making quite difficult the problem of separation of polydisperse polymers by their topology. By using a theory of chromatographic behavior of macromolecules, we simulate chromatograms of polydisperse polymers that differ solely in their topology, and discuss possibilities to separate complex polymers (such as eight-, tadpole-, theta-, manacleshaped polymers, etc.) from their linear, branched, or macrocyclic precursors or topo-isomeric products. As follows from the simulations, two approaches towards the separation of polydisperse polymers by topology are especially promising. The first one is the chromatography at optimized (critical or near-critical) interaction conditions, where molar-mass effects are minimized; The second one consists in combing different chromatographic modes, which allows obtaining a separation by both molar mass and topology in a 2D chromatogram. Some of the simulated chromatographic separations are qualitatively very similar to the real ones, the others are the theoretical prediction.

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“…Depending on whether components can be eluted from the first dimension into the second dimension directly or not, 2D-LC methods can be classified as on-line [1][2][3] or off-line [4][5][6], respectively. Furthermore, depending on whether first dimensional components are eluted into the second dimension completely or not, 2D-LC methods can be classified as comprehensive [3,7,8] or heart cutting [9][10][11], respectively.…”

Section: Introductionmentioning

confidence: 99%

The development of an evaluation method for capture columns used in two-dimensional liquid chromatography

Cao

Wang

et al. 2011

Analytica Chimica Acta

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Separation of branched polystyrene by comprehensive two-dimensional liquid chromatography

Cited by 81 publications

References 33 publications

Multidimensional Liquid Chromatographic Separations Applied to the Analysis of Food Samples

Multidimensional Liquid Chromatographic Separations Applied to the Analysis of Food Samples

Simulating chromatographic separation of topologically different polymers

The development of an evaluation method for capture columns used in two-dimensional liquid chromatography

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