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Reference type: Journal
Authors: Zhang D, Yu DJ, Zhao WJ, Yang QY, Kajiura H, Li YM, Zhou TS, Shi GY
Article Title: A molecularly imprinted polymer based on functionalized multiwalled carbon nanotubes for the electrochemical detection of parathion-methyl.
Publication date: 2012
Journal: Analyst
Volume: 137
Issue: (11)
Page numbers: 2629-2636.
DOI: 10.1039/C2AN35338E

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 x 10-7 to 1.0 x 10-5 mol L-1 with a lower detection limit of 6.7 x 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.
Template and target information: parathion-methyl

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