title: Molecularly imprinted polymer surfaces as solid-phase extraction sorbents for the extraction of 2-nitrophenol and isomers from environmental water.
abstract: The novel surface molecularly imprinted polymer (MIP) with 2-nitrophenol (2-NP) as the template has been prepared and used as the adsorbent for the solid-phase extraction (SPE). The selectivity of the polymer was checked toward several selected nitrophenols (NPs) such as 2-NP, 3-nitrophenol (3-NP), 4-nitrophenol (4-NP) and 2,4,6-trichlorophenol (2,4,6-TCP). Under the optimized conditions, high sensitivity (detection limits: 0.07-0.12 ng/mL) and good reproducibility of analytes (2.3-4.8% for four cycles) were achieved. Then, the method was applied for the analysis of selected phenols in spiked tap, lake and river water samples. High recoveries (>83.3%) for nitrophenols (NPs) were obtained, but lower recoveries (<63.4%) were achieved for 2,4,6-TCP. The method was found to be linear in the range of 1-300 ng/mL with correlation coefficients (R(2) ) greater than 0.99 and repeatability relative standard deviation (RSD) below 7.2% in all cases. For analysis of 120 mL water samples, the method detection limits (LODs) ranged from 0.10 to 0.22 ng/mL and the limit of quantification (LOQs) from 0.33 to 0.72 ng/mL. These results showed the suitability of the MIP-SPE method for the selective extraction of a group of structurally related isomeric compounds.
authors.affiliation: College of Chemistry and Chemical Engineering, Hainan Normal University, Hainan Provincial Key Laboratory of Tropical Medical Herb and Chemistry, Haikou, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Guan
authors.forename: Changri
authors.initials: C
authors.lastname: Han
authors.forename: Xue
authors.initials: X
authors.lastname: Wang
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Zou
authors.forename: Jianming
authors.initials: J
authors.lastname: Pan
authors.forename: Pengwei
authors.initials: P
authors.lastname: Huo
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Li
mesh_terms: D000327:Adsorption; D054802:Molecular Imprinting; D009596:Nitrophenols / Q000737:chemistry / Q000302:isolation & purification*; D011108:Polymers / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D013237:Stereoisomerism; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D009596:Nitrophenols; D011108:Polymers; D014874:Water Pollutants, Chemical; C045573:2-nitrophenol