Results 331 to 340 of about 1,089,847 (401)
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High-Performance Liquid Chromatography
2001Chromatography is a general term applied to a wide variety of separation techniques based on the sample partitioning between a moving phase, which can be a gas, liquid, or supercritical fluid, and a stationary phase, which may be either a liquid or a solid.
John G. Dorsey, Thomas H. Stout
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High-performance liquid chromatography of porphyrins
Journal of Chromatography B: Biomedical Sciences and Applications, 1988Techniques for the analysis of porphyrins in the biomedical fields are reviewed. The emphasis is on high-performance liquid chromatography and its aspplications in: (1) the quantitative analysis of porphyrins in blood, urine and faeces; (2) qualitative porphyrin profiles in normal subjects and in the porphyrias; (3) assay of haem biosynthetic enzyme ...
T.J. Peters, Famei Li, Chang Kee Lim
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Journal of Separation Science, 2017
A comparison of ultra high performance supercritical fluid chromatography, ultra high performance liquid chromatography, and gas chromatography for the separation of synthetic cathinones has been conducted.
Stephanie Carnes +6 more
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A comparison of ultra high performance supercritical fluid chromatography, ultra high performance liquid chromatography, and gas chromatography for the separation of synthetic cathinones has been conducted.
Stephanie Carnes +6 more
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High performance “ionic liquid” chromatography
Chemical Communications, 2011We firstly developed high performance liquid chromatography methods with "ionic liquids" as eluents (HPILC) and successfully demonstrated the analysis of various biopolymers including scarcely soluble highly polymerized cellulose by means of HPILC with highly polar ionic liquid.
Hiroyuki Ohno +3 more
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High-performance liquid chromatography of insulin
Journal of Chromatography A, 1984The elution behaviour of a selection of sequence variant and modified insulins has been compared on a C18 reversed-phase column. Observed elution times were compared with those expected from the nature of the differences from bovine insulin. In some cases prediction rules established for peptides are adequate to explain the observed elution and in ...
S.P. Wood, A. McLeod
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High-performance liquid chromatography of cardiolipin
Journal of Chromatography B: Biomedical Sciences and Applications, 1985Resolution of freshly prepared and of commercially available (degraded) samples of cardiolipin into 15-30 components has been accomplished by reversed-phase high-performance liquid chromatography using a 3-micron particulate Microsorb C18 column irrigated with linear gradients of acetonitrile--methanol--10 mM phosphate buffer pH 7.4.
Leland L. Smith, Jon I. Teng
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High-Performance Liquid Chromatography
1988Considerable attention has recently been focused on the biosynthesis and metabolism of bile acids in patients with hepatobiliary diseases, and the development of reliable methods is urgently required for the analysis of profiles of bile acids in biological materials.
Junichi Goto, Toshio Nambara
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Journal of Clinical Endocrinology and Metabolism, 1984
This report describes a microassay for 1,25-dihydroxyvitamin D [1,25-(OH)2D] in plasma which does not require high performance liquid chromatography. The assay involves rapid extraction and preliminary purification on a C-18 Sep-Pak cartridge, followed ...
T. Reinhardt +3 more
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This report describes a microassay for 1,25-dihydroxyvitamin D [1,25-(OH)2D] in plasma which does not require high performance liquid chromatography. The assay involves rapid extraction and preliminary purification on a C-18 Sep-Pak cartridge, followed ...
T. Reinhardt +3 more
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High-performance liquid chromatography of isopeptides
Journal of Chromatography A, 1986High-performance liquid chromatographic (HPLC) methods are described for the structural analysis of clavicepamines, their analogues and branched-chain polypeptides, the analysis in synthetic stages of isopeptides (analysis of half-protected derivatives and purity control of active esters) and the differentiation between alpha- and iso-peptides (such as
Gabriella Kelemen +2 more
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Journal of Separation Science, 2015
Paracetamol, caffeine and ibuprofen are found in over-the-counter pharmaceutical formulations. In this work, we propose two new methods for simultaneous determination of paracetamol, caffeine and ibuprofen in pharmaceutical formulations.
R. R. Cunha +6 more
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Paracetamol, caffeine and ibuprofen are found in over-the-counter pharmaceutical formulations. In this work, we propose two new methods for simultaneous determination of paracetamol, caffeine and ibuprofen in pharmaceutical formulations.
R. R. Cunha +6 more
semanticscholar +1 more source