Results 301 to 310 of about 462,107 (360)

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
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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
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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
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High pressure liquid chromatography of neutral glycosphingolipids

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1972
Abstract A system for the separation of neutral glycosphingolipids by high pressure liquid chromatography of their benzoylated derivatives has been devised. Serum mono-, di-, tri-and tetraglycosylceramides are completely resolved within 25 min. A full scale recorder response can be obtained with approximately 1.0 nmole of glycolipid.
J E, Evans, R H, McCluer
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Anthracycline Assay by High-pressure Liquid Chromatography

Journal of Pharmaceutical Sciences, 1981
A general method of analysis of anthracycline concentrations was developed. Drug is extracted from plasma with organic solvent and separated from metabolites by high-pressure liquid chromatography on an aminocyanosilica column. Detection and quantitation are by the endogenous fluorescence of compounds having an intact tetracyclic ring structure. Limits
S D, Averbuch, T T, Finkelstein, S E, Fandrich, S D, Reich   +3 more
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High-pressure liquid chromatography of steroidal alkaloids

Journal of Chromatography A, 1976
High-pressure liquid chromatography was used to separate the following steroidal alkaloids: tomatidine, solanidine, solasodine, rubijervine, veratramine and jervine. The method was used to prepare crystalline solanidine from a crude mixture of aglycones obtained from Solanum chacoense, and to separate radioactive solanidine from extracts of potato ...
I R, Hunter, M K, Walden, J R, Wagner, E, Heftmann   +3 more
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Method transfer from high-pressure liquid chromatography to ultra-high-pressure liquid chromatography. I. A thermodynamic perspective

Journal of Chromatography A, 2014
This is the first investigation in a series that aims to enhance the scientific knowledge needed for reliable analytical method transfer between HPLC and UHPLC using the quality by design (QbD) framework. Here, we investigated the differences and similarities from a thermodynamic point of view between RP-LC separations conducted with 3.5μm (HPLC) and 1.
Dennis, Åsberg, Marek, Leśko, Jörgen, Samuelsson, Krzysztof, Kaczmarski, Torgny, Fornstedt   +4 more
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High-pressured liquid chromatography of carotenoids

Journal of Chromatography A, 1978
Abstract The potential of high-pressure liquid chromatography (HPLC) for separation of carotenoids on silica has been studied with selected model carotenoids (carotenes, diols, cis—trans isomers and diastereoisomers) in comparison with conventional thin-layer chromatography and circular paper techniques.
Anne Fiksdahl, Julius T. Mortensen, Synnøve Liaaen-Jensen   +2 more
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Liquid-liquid partition coefficients by high-pressure liquid chromatography

Journal of Medicinal Chemistry, 1975
Lipid-water partition values can be rapidly and reliably measured by high-pressure liquid chromatography (HPLC) on bonded octadecylsialne supports. This method has been developed and applied to a family of hypotensive triaminopyrimidine 3-oxides. The measured column retention values for this class of compounds correlate well with the values calculated ...
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High Pressure Liquid Chromatography of Anthocyanins

Canadian Institute of Food Science and Technology Journal, 1975
Abstract An investigation of several high pressure liquid chromatographic (hplc) systems, potentially useful in rapidly separating mixtures of anthocyanins, indicated that a polyamide material called Pellidon performed the best. Three monoglucosides of malvidin, petunidin and peonidin were successfully separated in less than 20 minutes on a ⅛″ × 4 ...
C.H. Manley, P. Shubiak
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