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Title: Solid-phase extraction and liquid chromatography for improved assay of cyclosporine in whole blood or plasma
Authors: Kabra, P M ×
Wall, J H
Blanckaert, Norbert #
Issue Date: Oct-1985
Series Title: Clinical Chemistry vol:31 issue:10 pages:1717-20
Abstract: In this simple, precise, accurate, and specific isocratic liquid chromatographic procedure for determining cyclosporine, the cyclosporine is extracted from 1 mL of whole blood or from plasma, with 500 micrograms of cyclosporin D added per liter as internal standard, by elution from a Bond-ElutTM C18 extraction column with 300 microL of a mixture of ethanol and tetrahydrofuran. A 100-microL aliquot of the eluate, injected onto a cyano-phase analytical column, is eluted with a mixture of acetonitrile and pH 7.0 phosphate buffer at a flow rate of 1.0 mL/min and at 50 degrees C. Detection is at 210 nm. The chromatography is complete in less than 14.0 min. The method can measure less than 10.0 micrograms/L. Analytical recovery of cyclosporine added to whole blood ranged from 99 to 109% for concentrations up to 2000 micrograms/L. Between-run CVs ranged from 6.4 to 6.6%. None of numerous drugs and steroids tested interfered. Results by radioimmunoassay exceeded by 20 to 350% those measured by the present method.
ISSN: 0009-9147
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory of Clinical Bacteriology and Mycology
Department of Imaging & Pathology - miscellaneous
× corresponding author
# (joint) last author

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