title: Molecularly imprinted solid-phase extraction and flow-injection chemiluminescence for trace analysis of 2,4-dichlorophenol in water samples.
abstract: Highly sensitive flow-injection chemiluminescence (CL) combined with molecularly imprinted solid-phase extraction (MISPE) has been used for determination of 2,4-dichlorophenol (2,4-DCP) in water samples. The molecularly imprinted polymer (MIP) for 2,4-DCP was prepared by non-covalent molecular imprinting methods, using 4-vinylpyridine (4-VP) and ethylene glycol dimethacrylate (EGDMA) as the monomer and cross-linker, respectively. 2,4-DCP could be selectively adsorbed by the MIP and the adsorbed 2,4-DCP was determined by its enhancing effect on the weak chemiluminescence reaction between potassium permanganate and luminol. The enhanced CL intensity was linear in the range from 1 x 10(-7) to 2 x 10(-5) g mL(-1). The LOD (S/N = 3) was 1.8 x 10(-8) g mL(-1), and the relative standard deviation (RSD) was 3.0% (n = 11) for 1.4 x 10(-6) g mL(-1). The proposed method had been successfully applied to the determination of 2,4-DCP in river water.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P. O. Box 2871, Beijing, 100085, China.
authors.forename: Qin-Zhong
authors.initials: QZ
authors.lastname: Feng
authors.forename: Li-Xia
authors.initials: LX
authors.lastname: Zhao
authors.forename: Wei
authors.initials: W
authors.lastname: Yan
authors.forename: Feng
authors.initials: F
authors.lastname: Ji
authors.forename: Yan-Lin
authors.initials: YL
authors.lastname: Wei
authors.forename: Jin-Ming
authors.initials: JM
authors.lastname: Lin
mesh_terms: D002733:Chlorophenols / Q000032:analysis*; D003432:Cross-Linking Reagents / Q000737:chemistry; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods; D007700:Kinetics; D049449:Luminescence; D008689:Methacrylates / Q000737:chemistry; D054802:Molecular Imprinting / Q000295:instrumentation / Q000379:methods*; D011725:Pyridines / Q000737:chemistry; D015203:Reproducibility of Results; D045483:Rivers / Q000737:chemistry*; D012680:Sensitivity and Specificity; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D002733:Chlorophenols; D003432:Cross-Linking Reagents; D008689:Methacrylates; D011725:Pyridines; D014874:Water Pollutants, Chemical; C004919:ethylene dimethacrylate; C029351:4-vinylpyridine; C004762:2,4-dichlorophenol