Temperature dependence of the anion-exchange chromatographic behaviour of cyclic phosphate oligomers and their anion-exchange separation

Kura, Genichiro; Kitamura, Eri; Baba, Yoshinobu

doi:10.1016/0021-9673(93)80007-u

Cited by 18 publications

(7 citation statements)

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“…As a matter of fact, anion exchange chromatographic measurements performed up to 70 • C on cyclic phosphate oligomers do not show the presence of any hydrolysis products [14].…”

Section: Introductionmentioning

confidence: 91%

Thermodynamic aspects of the adsorption of hexametaphosphate on kaolinite

Castellini

Lusvardi

Malavasi

et al. 2005

Journal of Colloid and Interface Science

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“…As a matter of fact, anion exchange chromatographic measurements performed up to 70 • C on cyclic phosphate oligomers do not show the presence of any hydrolysis products [14].…”

Section: Introductionmentioning

confidence: 91%

Thermodynamic aspects of the adsorption of hexametaphosphate on kaolinite

Castellini

Lusvardi

Malavasi

et al. 2005

Journal of Colloid and Interface Science

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“…Horváth et al ,, used pellicular stationary phases to separate proteins at temperatures up to 120 °C. Moreover, the number of complex separation modes such as chiral recognition, − complexation, protein interactions, ,, and macrocycle mediation applied in new generation columns is growing steadily. These new separation mechanisms are often influenced by temperature to a much larger extent than is reversed-phase chromatography of small solutes…”

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confidence: 99%

Effect of Temperature on the Thermodynamic Properties, Kinetic Performance, and Stability of Polybutadiene-Coated Zirconia

Carr

1997

Anal. Chem.

102

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This article describes the results of a study of the effect of temperature on the performance of a reversed-phase material prepared by coating polybutadiene (PBD) on porous zirconia. We examined the effect of temperature on retention, efficiency, and stability of this phase. The thermodynamic properties were evaluated via the separation of alkylbenzenes and a set of tricyclic antidepressant drugs at different temperatures, while the intrinsic kinetic performance of the PBD phase at elevated temperatures was examined by using alkylbenzenes as probe solutes. Moreover, the thermal stability was determined by measuring the drift in k' while continuously pumping a mobile phase at 100 degrees C. We found that enthalpy changes were between -2 and -4 kcal/mol and that changes in selectivity varied with the type of solute. High temperatures improved the column efficiency by 30%, mainly by accelerating the solute diffusion rate in the stationary phase. Finally, the PBD-coated zirconia phase was very stable at a temperature of 100 degrees C for at least 7000 column volumes.

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“…Consequently, the main reported advantages have been reduced column back pressure, reduced analysis time and enhanced efficiency. [3][4][5][6][7][8][9][10] Traditional solvent gradient elution has been reported to be difficult with columns of small id, due to the small flow rates required. 11 However, the smaller dimensions of packed capillary columns make them especially well suited for temperature programming, due to their small thermal mass.…”

Section: Aim Of Investigationmentioning

confidence: 99%