Search Results - "Neue, Uwe D"

Theory of peak capacity in gradient elution by Neue, Uwe D.

“…Peak capacity is the best measure of the performance of a gradient separation. In this paper, the theory of peak capacity for the standard operating conditions…”
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Investigation of the effect of pressure on retention of small molecules using reversed-phase ultra-high-pressure liquid chromatography by Fallas, Morgane M., Neue, Uwe D., Hadley, Mark R., McCalley, David V.

“…The effect of inlet pressure on the retention of a series of low molecular weight acids, bases and neutrals, was investigated at constant temperature in…”
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Further investigations of the effect of pressure on retention in ultra-high-pressure liquid chromatography by Fallas, Morgane M., Neue, Uwe D., Hadley, Mark R., McCalley, David V.

“…In this study, we investigated further the large increases in retention with pressure that we observed previously in RP-LC especially for ionised solutes…”
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Comparison of the acidity of residual silanol groups in several liquid chromatography columns by Méndez, Alberto, Bosch, Elisabeth, Rosés, Martı́, Neue, Uwe D

“…The silanol acidity of Waters Resolve C 18, Waters Resolve silica, Waters Symmetry C 18, Waters Symmetry silica, Waters XTerra MS C 18 and underivatized XTerra…”
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Implications of column peak capacity on the separation of complex peptide mixtures in single- and two-dimensional high-performance liquid chromatography by Gilar, Martin, Daly, Amy E., Kele, Marianna, Neue, Uwe D., Gebler, John C.

“…Column peak capacity was utilized as a measure of column efficiency for gradient elution conditions. Peak capacity was evaluated experimentally for…”
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The combined effect of silanols and the reversed-phase ligand on the retention of positively charged analytes by Neue, Uwe D., Tran, KimVan, Méndez, Alberto, Carr, Peter W.

“…The nature of the interaction of positively charged analytes with the surface of reversed-phase bonded phases has been investigated as a function of both pH…”
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Characterization of HPLC packings by Neue, Uwe D., Van Tran, Kim, Iraneta, Pamela C., Alden, Bonnie A.

“…Several chromatographic test procedures are in use for the characterization of commercially available packings. The results of the test procedure used in our…”
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Estimation of the extent of the water-rich layer associated with the silica surface in hydrophilic interaction chromatography by McCalley, David V., Neue, Uwe D.

“…The possible presence of a mobile phase layer rich in water on the surface of silica columns used under conditions typical in hydrophilic interaction…”
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Effects of extra-column band spreading, liquid chromatography system operating pressure, and column temperature on the performance of sub-2-μm porous particles by Fountain, Kenneth J., Neue, Uwe D., Grumbach, Eric S., Diehl, Diane M.

“…The effects of extra-column band spreading, LC system operating pressure, and separation temperature were investigated for sub-2-μm particle columns using both…”
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Peak capacity in gradient reversed-phase liquid chromatography of biopolymers Theoretical and practical implications for the separation of oligonucleotides by GILAR, Martin, NEUE, Uwe D

“…Reversed-phase ultra-performance liquid chromatography was used for biopolymer separations in isocratic and gradient mode. The gradient elution mode was…”
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Performance of idealized column structures under high pressure by Neue, Uwe D., Kele, Marianna

“…We have examined the influence of the longitudinal temperature and pressure gradients in columns operated under very high pressures on the coefficients of the…”
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Selectivity in reversed-phase separations influence of the stationary phase by NEUE, Uwe D, O'GARA, John E, MENDEZ, Alberto

“…The selectivity difference between 15 different stationary phases was measured using a large number of analytes at 2 or 3 different pH values (3, 7 and 10)…”
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Stationary phase characterization and method development by Neue, Uwe D.

“…The properties of stationary phases and their characterization methods are reviewed. New and significant developments have occurred in the last few years, and…”
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Comment on “Submicrometer Plate Heights for Capillaries Packed with Silica Colloidal Crystals” by Neue, Uwe D

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application of novel 1.7 μm ethylene bridged hybrid particles for hydrophilic interaction chromatography by Grumbach, Eric S, Diehl, Diane M, Neue, Uwe D

“…An un-derivatized 1.7 μm ethylene bridged hybrid (BEH) particle was evaluated for its utility in retaining polar species in hydrophilic interaction…”
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Peak compression in reversed-phase gradient elution by Neue, Uwe D., Marchand, Daniel H., Snyder, Lloyd R.

“…Previous reports suggest that peak widths in linear gradient elution are consistently larger than predicted by theory; however, if gradient compression is…”
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Selectivity in reversed-phase separations: General influence of solvent type and mobile phase pH by Neue, Uwe D., Méndez, Alberto

“…The influence of the mobile phase on retention is studied in this paper for a group of over 70 compounds with a broad range of multiple functional groups. We…”
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The determination of the plate count for large molecules under reversed-phase gradient conditions by Neue, Uwe D., Hewitson, Hillary B., Wheat, Thomas E.

“…The true performance of HPLC columns in the gradient separation of macromolecules can be assessed by measuring the true plate count, if we know the retention…”
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Ion-pair reversed-phase high-performance liquid chromatography analysis of oligonucleotides:: Retention prediction by Gilar, Martin, Fountain, Kenneth J., Budman, Yeva, Neue, Uwe D., Yardley, Kurt R., Rainville, Paul D., Russell II, Reb J., Gebler, John C.

“…An ion-pair reversed-phase HPLC method was evaluated for the separation of synthetic oligonucleotides. Mass transfer in the stationary phase was found to be a…”
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The application of small porous particles, high temperatures, and high pressures to generate very high resolution LC and LC/MS separations by Plumb, Robert, Mazzeo, Jeff R., Grumbach, Eric S., Rainville, Paul, Jones, Michael, Wheat, Tom, Neue, Uwe D., Smith, Brian, Johnson, Kelly A.

“…The effect of combining sub‐2 μm porous particles with elevated operating temperatures on chromatographic performance has been investigated in terms of…”
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