Results 251 to 260 of about 225,502 (309)

High Pressure Liquid Chromatography

Journal of Pharmaceutical Sciences, 1973
Abstract Prior to 1967, liquid column chromatography (LCC) separations were not normally carried out in an optimum manner; for this reason, the technique was viewed as slow and inefficient (1–3). Consequently, other techniques such as thin-layer chromatography (TLC) and gas chromatography (GC) found favor.
A F, Michaelis, D W, Cornish, R, Vivilecchia   +2 more
exaly   +4 more sources

Analysis of Trisulfapyrimidines by High-Pressure Liquid Chromatography

Journal of Pharmaceutical Sciences, 1973
Abstract: The application of high-pressure liquid chromatography to the separation and analysis of trisulfapyrimidines in pharmaceutical dosage forms is demonstrated. The preparation of samples of both tablet and suspension dosage forms is simple and rapid.
R B, Poet, H H, Pu
exaly   +3 more sources

The impact of pressure and frictional heating on retention, selectivity and efficiency in ultra-high-pressure liquid chromatography

TrAC - Trends in Analytical Chemistry, 2014
© 2014 Elsevier B.V. The effects of pressure and frictional heating deserve serious consideration in ultra-high-pressure liquid chromatography (UHPLC) separations, as the pressures used can be three times greater than those in conventional high ...
David V Mccalley
exaly   +2 more sources

Effects of high pressure in liquid chromatography

Journal of Chromatography A, 2005
All the experimental parameters that the chromatographers are used to consider as constant (the column length and its diameter, the particle size, the column porosities, the phase ratio, the column hold-up volume, the pressure gradient along the column, the mobile phase density and its viscosity, the diffusion coefficients, the equilibrium constants ...
Martin, Michel, Guiochon, Georges
openaire   +2 more sources

High-pressure liquid chromatography of steroids

Journal of Chromatography A, 1979
After a brief discussion of the merits and limitations of high-pressure liquid chromatography (HPLC) relative to other chromatographic methods, special problems in the application to steroids are discussed. Publications on HPLC of steroids are then discussed under the headings of individual classes, arranged generally in the order of increasing ...
E, Heftmann, I R, Hunter
openaire   +2 more sources

High pressure liquid chromatography of oligodeoxyribonucleotides

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1973
Abstract A high pressure liquid chromatography system capable of resolving oligodeoxy-ribonucleotides of intermediate size is described. Columns filled with a pellicular weak anion exchanger consisting of a polymeric aliphatic amine permit the rapid resolution of small amounts of oligomers.
A F, Cook, A, de Czekala, T F, Gabriel, C L, Harvey, M, Holman, J E, Michaelewsky, A L, Nussbaum   +6 more
openaire   +2 more sources

High-pressure liquid chromatography of peptides

Journal of Chromatography A, 1977
Peptides varying in size from di- to decapeptide have been subjected to high-pressure liquid chromatography on Phenyl-Corasil, Poragel PN, and Poragel PS under reversed-phase conditions with acetonitrile-water mixtures. It has been found that residual silanol groups in the Phenyl-Corasil and the functional groups in the Poragels significantly influence
J J, Hansen, T, Greibrokk, B L, Currie, K N, Johansson, K, Folkers   +4 more
openaire   +2 more sources

Laboratory Automation of High‐Pressure Liquid Chromatography

Journal of Pharmaceutical Sciences, 1975
An automated system for high-pressure liquid chromatography was developed. The system is built around commercial modules wherever possible, modified to varying degrees. An automatic sampler, a sample pump, a high-pressure sampling valve, a recorder with an integrator, and a high-pressure liquid chromatograph comprise the commercial instruments. Relays,
W F, Beyer, D D, Gleason
openaire   +2 more sources

Thimerosal Determination by High-Pressure Liquid Chromatography

Journal of Pharmaceutical Sciences, 1978
A sensitive and useful high-pressure liquid chromatographic method for the determination of intact thimerosal was developed. This method is extremely fast and reliable, and its inherent specificity makes it a breakthrough over other common wet chemical methods.
R C, Meyer, L B, Cohn
openaire   +2 more sources

Analysis of leukotrienes by high-pressure liquid chromatography

Analytical Biochemistry, 1981
Abstract A reversed-phase high-pressure liquid chromatographic procedure has been developed to separate and quantitate leukotrienes. This procedure is based on the ultraviolet absorption of the conjugated triene moiety of these compounds and is sensitive to the nanogram level.
W R, Mathews, J, Rokach, R C, Murphy
openaire   +2 more sources