title: Restricted access media-molecularly imprinted polymer for propranolol and its application to direct injection analysis of beta-blockers in biological fluids.
abstract: A restricted access media-molecularly imprinted polymer (RAM-MIP) for propranolol (PRP) has been prepared for direct injection analysis of beta-blockers in biological fluids. First, the MIP for PRP was prepared using methacrylic acid and ethylene glycol dimethacrylate as the functional monomer and cross-linker, respectively, by a multi-step swelling and polymerization method. Next, a 1:1 mixture of glycerol monomethacrylate and glycerol dimethacrylate was used for hydrophilic surface modification, and added directly to the MIP for PRP after 4 h from the start of polymerization. Then further polymerization was carried out for 20 h. The obtained RAM-MIP for PRP showed excellent molecular recognition ability for PRP, good ones for alprenolol (ALP) and pindolol, and fair ones for other beta-blockers. The RAM-MIP was applied for direct injection analysis of ALP enantiomers in a rat plasma sample by a column-switching HPLC system using a beta-cyclodextrin phenylcarbamate-bonded silica column as the analytical column. The calibration graph, constructed from peak area versus each ALP enantiomer concentration, was linear with a correlation coefficient of > 0.999 over the concentration ranges of 12.5-250 ng ml(-1). The limit of quantitation was 12.5 ng ml(-1) with a 50 microl injection. This method could be applicable for the assay of ALP enantiomers at the therapeutic plasma levels, and have wide applicability for the assay of beta-blockers in biological fluids.
authors.affiliation: Faculty of Pharmaceutical Sciences, Mukogawa Women's University, 11-68, Koshien Kyuban-cho, Nishinomiya, Hyogo 663-8179, Japan.
authors.forename: Haruyo
authors.initials: H
authors.lastname: Sanbe
authors.forename: Jun
authors.initials: J
authors.lastname: Haginaka
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000032:analysis* / Q000097:blood; D000526:Alprenolol / Q000032:analysis; D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods; D006801:Humans; D010869:Pindolol / Q000032:analysis; D011108:Polymers; D011433:Propranolol; D051381:Rats; D012680:Sensitivity and Specificity
chemical_list: D000319:Adrenergic beta-Antagonists; D011108:Polymers; D000526:Alprenolol; D011433:Propranolol; D010869:Pindolol