Results 271 to 280 of about 36,758 (301)
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Retention of long-chain acetylenic hydrocarbons on non-polar stationary phases
Journal of Chromatography A, 2009The retention indices of methyl and trimethylsilyl esters of octadeca-, eicosa- and tricosa-ynoic fatty acids containing acetylenic bonds were measured on non-polar stationary phase (dimethylsilicone with 5% phenyl groups). An unusually large increase in retention is observed for compounds containing conjugated and methylene interrupted acetylenic ...
K V, Tretyakov, V I, Babushok
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Journal of Separation Science, 2010
AbstractZwitterionic hydrophilic interaction chromatography (ZIC®‐HILIC) was used to study the retention of selected organoarsenicals. The retention behavior of nine organic arsenic species on ZIC®‐HILIC was investigated to elucidate which is the driving force for their separation, hydrophilic partitioning or adsorption driven by hydrogen bonds with ...
Dan, Xie +2 more
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AbstractZwitterionic hydrophilic interaction chromatography (ZIC®‐HILIC) was used to study the retention of selected organoarsenicals. The retention behavior of nine organic arsenic species on ZIC®‐HILIC was investigated to elucidate which is the driving force for their separation, hydrophilic partitioning or adsorption driven by hydrogen bonds with ...
Dan, Xie +2 more
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Journal of Chromatography A, 2006
In the past few decades, shape selectivity has drawn a great deal of attention from chromatographers. The chemistry and characteristics of bonded stationary phases such as phase type, length of bonded phase, surface coverage, and silica surface material have an effect on the shape selectivity of the columns.
Luxsana, Limsavarn, John G, Dorsey
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In the past few decades, shape selectivity has drawn a great deal of attention from chromatographers. The chemistry and characteristics of bonded stationary phases such as phase type, length of bonded phase, surface coverage, and silica surface material have an effect on the shape selectivity of the columns.
Luxsana, Limsavarn, John G, Dorsey
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Characterisation of GC stationary phases in multilinear retention model
Chromatographia, 1998Stationary phases are characterised in a multilinear retention model by retention data of a set of selected prototypical substances. Prototypical stationary phases confirm the application of prototypical substances in the retention model. For comparison, 27 stationary phases are characterized with solute descriptors of the solvation model. New adjusted
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Influence of structure of alkenes on their retention on different stationary phases
Chromatographia, 1988Retention indices of different alkenes are correlated with connectivity and topological parameters. The appropriate statistically valid relations hips are derived and discussed.
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Journal of chromatography, 1994
We provide a somewhat historical perspective on the work that has been accomplished that supports the suggestion of phase transitions in reversed-phase liquid chromatographic bonded phases. In addition to this general review, we consider from both a practical and theoretical viewpoint the implications of such transitions in the rational design of ...
J F, Wheeler +4 more
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We provide a somewhat historical perspective on the work that has been accomplished that supports the suggestion of phase transitions in reversed-phase liquid chromatographic bonded phases. In addition to this general review, we consider from both a practical and theoretical viewpoint the implications of such transitions in the rational design of ...
J F, Wheeler +4 more
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Characterization of stationary phases by retention data and solvation parameters
Journal of Separation Science, 2001Method requirements for the characterization of stationary phases are established. The completeness of the method and the influence of a mixed retention mechanism involving both solvation and adsorption on characteristic phase parameters are discussed.
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Analytical Chemistry, 1992
The retention mechanism in reversed-phase liquid chromatography (RPLC) has been investigated by examining the temperature dependence of retention, with emphasis on the role of the stationary phase in the retention process. Both chromatographic temperature studies and differential scanning calorimetry were used to examine the role of alkyl chain bonding
L A, Cole, J G, Dorsey
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The retention mechanism in reversed-phase liquid chromatography (RPLC) has been investigated by examining the temperature dependence of retention, with emphasis on the role of the stationary phase in the retention process. Both chromatographic temperature studies and differential scanning calorimetry were used to examine the role of alkyl chain bonding
L A, Cole, J G, Dorsey
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Chromatographia, 1989
Cellulose and cellulose mono-, di-, and triacetate were used as stationary phases for liquid chromatography with water as a mobile phase, and the retention behavior of alcohols, ethers, ketones, and chlorides was examined. For cellulose acetate columns, the logarithm of the specific retention volume, (logV g *
KISO, Y, KITAO, T, GE, YS, JINNO, K
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Cellulose and cellulose mono-, di-, and triacetate were used as stationary phases for liquid chromatography with water as a mobile phase, and the retention behavior of alcohols, ethers, ketones, and chlorides was examined. For cellulose acetate columns, the logarithm of the specific retention volume, (logV g *
KISO, Y, KITAO, T, GE, YS, JINNO, K
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Analytical Chemistry, 1989
The partitioning model of retention for reversed-phase liquid chromatography, described by mean-field statistical thermodynamic theory, asserts that one principal driving force for solute retention is the creation of a solute-sized cavity in the stationary phase. Beyond a critical stationary phase bonding density, increased grafted chain density should
K B, Sentell, J G, Dorsey
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The partitioning model of retention for reversed-phase liquid chromatography, described by mean-field statistical thermodynamic theory, asserts that one principal driving force for solute retention is the creation of a solute-sized cavity in the stationary phase. Beyond a critical stationary phase bonding density, increased grafted chain density should
K B, Sentell, J G, Dorsey
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