Abstract
A rapid and sensitive high-performance liquid chromatographic method for the analysis of β- and γ-cyclodextrin in aqueous biological fluids such as plasma, urine, or tissue homogenate is described. The chromatographic system consists of a μBondapak Phenyl column as stationary phase and a mobile phase of water with 10% methanol. After post-column addition of an alkaline solution of phenolphthalein, negative colorimetric detection is used. The elution solvent and post-column reagent were mixed in a capillary tubing of 1.5 m (1.0 mm I.D.). Two methods of sample treatment are given, one for large (1.0 ml) and one for small (0.1 ml) sample volumes. Both methods were shown to be linear and reproducible. The detection limit for β-cyclodextrin was 1.0 μg/ml (0.77 nmol/ml). The method was used in the determination of some pharmacokinetic parameters of β-cyclodextrin in rats after intravenous injection.
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