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Reference type: Journal
Authors: Zhang J, Lei JP, Ju HX, Wang CY, Niu YH
Article Title: An amperometric sensor for picloram based on its imprinting in composite membrane of o-aminothiophenol and Au nanoparticles.
Publication date: 2013
Journal: Scientia Sinica Chimica
Volume: 43
Issue: (5)
Page numbers: 585-591.
DOI: 10.1360/032012-391
Alternative URL: http://engine.scichina.com/publisher/scp/journal/SSC/43/5/10.1360/032012-391?slug=full%20text

Abstract: A novel amperometric sensor based on picloram imprinted polymer membrane was fabricated on gold electrode for the detection of picloram by self-assembly of o-aminothiophenol (oATP) and electropolymerization of oATP/Au nanoparticles in the presence of template molecule. The modification procedure was characterized via cyclic voltammetry and electrochemical impedance spectroscopy. The interaction between oATP and picloram was confirmed by ultraviolet spectroscopy. In the presence of K3Fe(CN)6 as redox probe, the peak current of differential pulse voltammmogram decreased linearly with the increasing concentration of picloram from 2.0 x 10-7 to 2.4 x 10-4 mol/L (r = 0.9963). The detection limit was 6.5 x 10-8 mol/L (S/N=3). Acceptable results for the recovery of standard addition of picloram in environmental water samples were obtained using the proposed imprinted sensor.
Template and target information: picloram
Author keywords: molecular imprinting, Au nanoparticles, o-aminothiophenol, picloram, amperometric sensor

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