Author(s): Su Q, Zeng C, Tang Y, Finlow DE, Cao M
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Abstract Molecularly imprinted microspheres (MIMs) for the drug diazepam and its main metabolite (nordiazepam) were prepared and used to separate the two species from urine and serum samples via molecularly imprinted solid-phase extraction. The specific binding capacity for diazepam was determined to be 1.97 mg/g, resulting in an imprinting factor of 5.8. The MIMs exhibit highly selective binding affinity for tricyclic benzodiazepines. Water-acetonitrile-acetone mixtures were used as the washing solvent and resulted in complete baseline separation, with a recovery of >87\% for diazepam and of 88\% for nordiazepam. The limits of detection are 21.5 and 24.5 ng/mL, respectively.
This article was published in J Chromatogr Sci
and referenced in Pharmaceutica Analytica Acta