Results 131 to 140 of about 1,028,683 (174)
Automated and Fully Validated High-Throughput LC-MS/MS Assay for Analyzing Multiple Drugs of Abuse in Oral Fluids Using Novel Features in Sample Preparation and Chromatographic Conditions. [PDF]
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High Pressure Liquid Chromatography
Journal of Pharmaceutical Sciences, 1973Abstract 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.
D.W. Cornish +2 more
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Effects of high pressure in liquid chromatography
Journal of Chromatography A, 2005All 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 ...
Georges Guiochon +2 more
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High-pressure liquid chromatography of steroids
Journal of Chromatography A, 1979After 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 ...
Irving R. Hunter, Erich Heftmann
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High pressure liquid chromatography of oligodeoxyribonucleotides
Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1973Abstract 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. de Czekala +6 more
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High-pressure liquid chromatography of peptides
Journal of Chromatography A, 1977Peptides 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
K. Nils-Gunnarjohansson +4 more
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High-pressured liquid chromatography of carotenoids
Journal of Chromatography A, 1978Abstract 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 +2 more
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High Pressure Liquid Chromatography of Anthocyanins
Canadian Institute of Food Science and Technology Journal, 1975Abstract 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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