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Picomolar Detection of Melamine Using Molecularly Imprinted Polymer‐Based Electrochemical Sensors Prepared by UV‐Graft Photopolymerization
Author(s) -
Bakas Idriss,
Salmi Zakaria,
Jouini Mohamed,
Geneste Florence,
Mazerie Isabelle,
Floner Didier,
Carbonnier Benjamin,
Yagci Yusuf,
Chehimi Mohamed M.
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400382
Subject(s) - melamine , molecularly imprinted polymer , photopolymer , chemistry , detection limit , aqueous solution , monomer , cyanuric acid , electrochemistry , solvent , polymer , ionic liquid , molecular imprinting , polymer chemistry , electrode , selectivity , organic chemistry , chromatography , catalysis
Molecularly imprinted polymer (MIP) films of melamine were prepared by photopolymerization of vinylic monomers on diazonium‐modified gold electrodes. The gold‐grafted MIPs are specific and selective for melamine in either organic or aqueous media. The interferent molecules cyromazine and cyanuric acid were not recognized by the MIPs. The limit of detection was as low as 1.75×10 −12 mol L −1 at S/N =3. Efficiency of melamine rebinding is related to the solubility parameter of the organic solvent or pH and ionic strength of the aqueous medium. It is concluded that diazonium salts permit to design robust electrochemical MIP sensors.