Results 291 to 300 of about 1,583,880 (361)

Metabolic Signatures in Adipose Tissue Linking Lipophilic Persistent Organic Pollutant Mixtures to Blood Pressure Five Years After Bariatric Surgery Among Adolescents. [PDF]

Environ Sci Technol
Pan S, Li Z, Walker DI, Baumert BO, Wang H, Goodrich JA, Rock S, Inge TH, Jenkins TM, Sisley S, Bartell SM, Xanthakos S, Lin X, McNeil B, Robuck AR, Mullins CE, La Merill MA, Garcia E, Aung MT, Eckel SP, McConnell R, Conti DV, Ryder JR, Chatzi L.   +23 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.
Krzysztof Kaczmarski, Dennis Åsberg, Marek Leśko, Jörgen Samuelsson, Torgny Fornstedt   +4 more
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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.
D.W. Cornish, A.F. Michaelis, R. Vivilecchia   +2 more
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Determination of zearalenone in cornflakes and other corn-based foods by thin layer chromatography, high pressure liquid chromatography, and gas-liquid chromatography/high resolution mass spectrometry.

Journal - Association of Official Analytical Chemists, 1978
A simple cleanup procedure based on pH adjustments was used to obtain extracts of corn foods. The method gave good recoveries of zearalenone determined by thin layer chromatography (TLC) and high pressure liquid chromatography (HPLC).
Peter M Scott, Thavil Panalaks, S. Kanhere, Walter F. Miles   +3 more
semanticscholar   +1 more source

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 ...
Georges Guiochon, Georges Guiochon, Michel Martin   +2 more
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System selectivity cube: a 3D visualization tool for comparing the selectivity of gas chromatography, supercritical-fluid chromatography, high-pressure liquid chromatography, and micellar electrokinetic capillary chromatography systems.

Analytical Chemistry, 2010
A three-dimensional visualization tool termed the system selectivity cube (SSC) has been developed to aid in the selection of chromatography systems. The most effective way to change the resolution of a complex mixture is to change the selectivity of the
Andrew R. Johnson, M. Vitha, T. Urness, T. Marrinan   +3 more
semanticscholar   +1 more source

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 ...
Irving R. Hunter, Erich Heftmann
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Simultaneous determination of alpha-tocopherol and retinol in plasma or red cells by high pressure liquid chromatography.

American Journal of Clinical Nutrition, 1979
This paper describes a rapid, microprocedure for the simultaneous determination of alpha-tocopherol (vitamin E) and retinol (vitamin A) in plasma, and of alpha-tocopherol alone in red cells since cells do not contain retinol. A total lipid extract from 0.
J. G. Bieri, T. Tolliver, G. Catignani
semanticscholar   +1 more source