Abstract
A method to analyze cholesterol and 10 of its oxidation products, ranging from the weakly polar cholest-4-ene-3,6-dione to moderately polar cholest-5-ene-3β,7α-diol, in a single run is described. The separation was achieved by normal-phase gradient high-performance liquid chromatography with an evaporative light-scattering detector. This universal mass detector does not detect changes in solvent composition; this makes it possible to employ gradients, an essential technique whenever a wide range of compounds with diverse characteristics is to be separated. Standards at concentrations from 0.1–1.0 µg were separated within 37 min on an alumina/silica column with a gradient elution system that contained dichloromethane, acetonitrile, and water.
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Lakritz, L., Jones, K.C. Separation and quantitation of cholesterol oxides by HPLC with an evaporative light scattering detector in a model system. J Amer Oil Chem Soc 74, 943–946 (1997). https://doi.org/10.1007/s11746-997-0008-1
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DOI: https://doi.org/10.1007/s11746-997-0008-1