Abstract
Abstract A rapid, sensitive and specific high pressure liquid chromatographic (HPLC) assay was developed for the determination of chlordiazepoxide and its metabolites from plasma. The assay involves extraction of chlordiazepoxide and its metabolites into diethyl ether from plasma buffered to pH 9. The overall recovery of chlordiazepoxide is 80 ± 5.0% (S.D.) and the sensitivity limit of detection is 50 to 100 ng/ml of plasma, using a 1 ml specimen. The assay was used in the determination of plasma levels of chlordiazepoxide and its metabolites in man following oral administration of chlordiazepoxide. HCl. The chromatographic behavior of other clinically important benzodiazepines and their major metabolites is also reported.
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