title: Sampling 4-chlorophenol in water by DGT technique with molecularly imprinted polymer as binding agent and nylon membrane as diffusive layer.
abstract: For the first time, a diffusive gradients in thin films (DGT) device using molecularly imprinted polymer (MIP) as the binding agent and nylon membrane (NM) as the diffusive layer (NM-MIP-DGT) has been developed for sampling 4-chlorophenol (4-CP) in water. The MIP was prepared by precipitation polymerization with methacrylic acid as monomer and ethyleneglycoldimethacrylate as cross-linker. The diffusion coefficient of 4-CP through NM was obtained to be 0.788±0.040 μ cm(2) s(-1) by diffusion cell method. The ratio was 1.01±0.05 (mean±standard deviation) for the concentration of 4-CP sampled by NM-MIP-DGT and analyzed by HPLC method to the total concentration of 4-CP in the synthetic solution where free 4-CP species dominated. The results showed that NM-MIP-DGT could sample 4-CP in synthetic solution accurately. The performance of NM-MIP-DGT for sampling 4-CP was independent of pH in the range of 3-7 and ionic strength in the range of 0.0001-0.1 mol L(-1) NaCl solution. The concentration of free form of 4-CP sampled by NM-MIP-DGT decreased with the increasing concentration of dissolved organic carbon in different water samples due to the electrostatic interaction of natural organic compounds with 4-CP. 1.8 mg L(-1) of the free form of 4-CP was determined by HPLC which was sampled by NM-MIP-DGT in an intermediate untreated industrial effluent. The NM-MIP-DGT can be a potential passive tool for sampling the free form of 4-CP in water.
authors.affiliation: Department of Chemistry, College of Science, Northeastern University, Shenyang, 110032, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Dong
authors.affiliation: Department of Chemistry, College of Science, Northeastern University, Shenyang, 110032, China; College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang, 110142, China.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Fan
authors.affiliation: Department of Chemistry, College of Science, Northeastern University, Shenyang, 110032, China.
authors.forename: Dianpeng
authors.initials: D
authors.lastname: Sui
authors.affiliation: Department of Chemistry, College of Science, Northeastern University, Shenyang, 110032, China.
authors.forename: Liangchen
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Chemistry, College of Science, Northeastern University, Shenyang, 110032, China. Electronic address: sun1th@163.com.
authors.forename: Ting
authors.initials: T
authors.lastname: Sun
mesh_terms: D000327:Adsorption; D002733:Chlorophenols / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D004058:Diffusion; D006863:Hydrogen-Ion Concentration; D054802:Molecular Imprinting; D009757:Nylons / Q000737:chemistry*; D009994:Osmolar Concentration; D011108:Polymers / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D002733:Chlorophenols; D009757:Nylons; D011108:Polymers; D014874:Water Pollutants, Chemical; C029107:4-chlorophenol
keywords: 4-Chlorophenol; Diffusive gradients in thin films; Molecularly imprinted polymer; Nylon membrane