Determination of cortisol in human plasma by reversed-phase high-performance liquid chromatography.


A method is described for the measurement of cortisol in human plasma using 45% aqueous methanol eluent on a 120 mm x 4.5 mm I.D. Hypersil octadecylsilane column with UV detection at 239 nm after a simple dichloromethane extraction and evaporation with a prednisone internal standard. The sample preparation time and chromatography time are each about 15 min… (More)


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