Molecularly imprinted conducting polymer based electrochemical sensor for detection of atrazine.
An original electrochemical sensor based on molecularly imprinted conducting polymer (MICP) is developed, which enables the recognition of a small pesticide target molecule, atrazine. The conjugated MICP, poly(3,4-ethylenedioxythiophene-co-thiophene-acetic acid), has been electrochemically synthesized onto a platinum electrode following two steps: (i) polymerization of comonomers in the presence of atrazine, already associated to the acetic acid substituent through hydrogen bonding, and (ii) removal of atrazine from the resulting polymer, which leaves the acetic acid substituents open for association with atrazine. The obtained sensing MICP is highly specific towards newly added atrazine and the recognition can be quantitatively analyzed by the variation of the cyclic voltammogram of MICP. The developed sensor shows remarkable properties: selectivity towards triazinic family, large range of detection (10(-9) mol L(-1) to 1.5 x 10(-2) mol L(-1) in atrazine) and low detection threshold (10(-7) mol L(-1)).
Pardieu
Elodie
E
Chaire de Génie Analytique, EA 4131, Conservatoire National des Arts et Métiers, CNAM, 292 rue Saint-Martin, 75141 Paris Cedex 03, France.
Cheap
Helene
H
Vedrine
Christophe
C
Lazerges
Mathieu
M
Lattach
Youssef
Y
Garnier
Francis
F
Remita
Samy
S
Pernelle
Christine
C
D001280:Atrazine / Q000032:analysis*; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D054802:Molecular Imprinting / Q000379:methods*; D010575:Pesticides / Q000032:analysis*; D010984:Platinum / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*
D010575:Pesticides; D011108:Polymers; D010984:Platinum; D001280:Atrazine