title: Novel beta-cyclodextrin modified organic polymeric monolithic substrate for solid phase extraction-room temperature phosphorescence.
abstract: An organic polymeric monolithic disk was prepared by situ polymerization of glycidyl methacrylate (GMA) and ethylene dimethacrylate (EDMA) in a binary porogenic solvent consisting 1-propanol and 1,4-butanediol, then modified by a reaction with beta-cyclodextrin (beta-CD). The beta-CD modified disk can be used as a solid substrate and solid phase extraction (SPE) membrane for solid phase extraction-room temperature phosphorescence (SPE-RTP). The room temperature phosphorescence (RTP) behaviors of 14 organic compounds on the beta-CD modified disk were examined. The results indicated that phenanthrene, 7,8-benzoquinoline, carbazole, fluorene, 3-indoleacetic acid and 1-naphthylacetic acid can emit strong RTP, and the limits of detection (LOD) were found to be 6.5 x 10(-10)-3.0 x 10(-9) mol mL(-1). Used as solid phase extraction membrane, the modified disk could selectively enrich compounds with three rings such as phenanthrene, 7,8-benzoquinoline, carbazole and fluorene. After solid phase extraction, LODs of four compounds were decreased to 4.0 x 10(-12)-6.4 x 10(-11) mol mL(-1). The method was applied to the determination of fluorene and phenanthrene in biosamples with satisfactory results.
authors.affiliation: Department of Chemistry, Capital Normal University, Beijing, China. zhurh@mail.cnu.edu.cn
authors.forename: Zhu
authors.initials: Z
authors.lastname: Ruohua
authors.forename: Xu
authors.initials: X
authors.lastname: Wenting
mesh_terms: D004852:Epoxy Compounds; D005449:Fluorenes / Q000032:analysis; D008163:Luminescent Measurements / Q000379:methods; D008689:Methacrylates; D010616:Phenanthrenes / Q000032:analysis; D011108:Polymers; D052617:Solid Phase Microextraction / Q000379:methods; D047392:beta-Cyclodextrins
chemical_list: D004852:Epoxy Compounds; D005449:Fluorenes; D008689:Methacrylates; D010616:Phenanthrenes; D011108:Polymers; D047392:beta-Cyclodextrins; C041509:fluorene; C031181:phenanthrene; C004919:ethylene dimethacrylate; C031215:betadex; C007870:glycidyl methacrylate