title: A molecularly imprinted polymer based on functionalized multiwalled carbon nanotubes for the electrochemical detection of parathion-methyl.
abstract: A novel composite of vinyl group functionalized multiwalled carbon nanotubes (MWCNTs) molecularly imprinted polymer (MIP) was synthesized and applied as a molecular recognition element to construct an electrochemical sensor for parathion-methyl in this paper. The special molecular recognition properties of parathion-methyl mainly dominated by π-π, p-π interaction and hydrogen bonding formed among functional monomer, template and matrix. A series of electrochemical experiment results proved that the prepared material had good adsorption capacity and fast mass transfer rate to parathion-methyl. The good selectivity of the sensor allowed fine discrimination between parathion and paraoxon, which had similar structures to parathion-methyl. The response of the MIPs was linearly proportional to the concentration of parathion-methyl over the range of 2.0 × 10(-7) to 1.0 × 10(-5) mol L(-1) with a lower detection limit of 6.7 × 10(-8) mol L(-1) (S/N = 3). This sensor was also applied in the detection of parathion-methyl in pear and cucumber with average recoveries of between 94.9% and 106.2% (RSD < 5%) being obtained. The results mentioned above show that the novel electrochemical sensor is an ideal device for the real-time determination of parathion-methyl in real samples.
authors.affiliation: Department of Chemistry and Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, PR China.
authors.forename: Dan
authors.initials: D
authors.lastname: Zhang
authors.forename: Dajun
authors.initials: D
authors.lastname: Yu
authors.forename: Wenjie
authors.initials: W
authors.lastname: Zhao
authors.forename: Qinyan
authors.initials: Q
authors.lastname: Yang
authors.forename: Hisashi
authors.initials: H
authors.lastname: Kajiura
authors.forename: Yongming
authors.initials: Y
authors.lastname: Li
authors.forename: Tianshu
authors.initials: T
authors.lastname: Zhou
authors.forename: Guoyue
authors.initials: G
authors.lastname: Shi
mesh_terms: D000327:Adsorption; D055664:Electrochemical Techniques; D004566:Electrodes; D006860:Hydrogen Bonding; D008743:Methyl Parathion / Q000032:analysis*; D054802:Molecular Imprinting; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D011108:Polymers; D008743:Methyl Parathion