High-performance liquid chromatographic assay of propofol in human and rat plasma and fourteen rat tissues using electrochemical detection |
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Authors: | Robert H Dowrie William F Ebling Jaap W Mandema Donald R Stanski |
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Institution: | aDepartment of Anesthesia, Stanford University School of Medicine, Stanford, CA 94305, USA;bDepartment of Pharmaceutics, School of Pharmacy, State University of New York, Buffalo, NY 14260, USA |
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Abstract: | This paper describes a sensitive HPLC-electrochemical detection analytical method for determining the concentration of the intravenous anesthetic, propofol, in human or rat plasma or serum and a variety of rat tissues. Internal standard and drug are extracted from serum or plasma and other tissues with pentane. 2,6-tert.-Butylmethylphenol is used as internal standard. It includes a novel steam distillation procedure for separating the highly lipophilic propofol from skin and fat. The plasma/serum assay has a precision of 1–4% (C.V.) in the range 10 ng/ml to 1 μg/ml and permits the assay of 5 ng/ml from 0.1 ml of plasma/serum. The tissue procedure allows the estimation of 50 ng/g in 0.1 g of tissue for most of the major organs with less than 2% (C.V.) precision. This assay was used to measure propofol concentrations in plasma/serum and tissue samples in support of a project to develop a physiological pharmacokinetic model for propofol in the rat. |
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Keywords: | Propofol |
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