Double-imprinted potentiometric sensors based on ligand exchange for the determination of dimethoate

• Published in: The Korean journal of chemical engineering 2015, 32(8), 185, pp.1613-1617
• Main Authors: Bektaşoğlu, Eyüp, Özkütük, Ebru Birlik, Ersöz, Arzu, Say, Rıdvan
• Format: Article
• Language: English
• Subjects: Biotechnology; Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Materials Science; 화학공학
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-014-0386-7

This paper describes a dimethoate imprinted polymeric potentiometric sensor for the determination of dimethoate that was designed by dispersing the dimethoate-imprinted polymer in dibutyl phthalate plasticizer and then embedded in polyvinyl chloride matrix. The method is based on molecularly imprinted polymer (MIP), which can be synthesized by using dimethoate as a template molecule, chitosan-Cd(II), and 3-mercaptopropyl-trimethoxysilane as a functional monomer and TEOS, and ephychlorohydrin as a cross-linking agent. We have studied a method for the selective binding behavior of dimethoate compounds on the surface of imprinted polymers which is prepared using ligand-exchange (LE) (chitosan-Cd(II)) monomer. The MIP-LE-1 and MIP-LE-2 based membranes have shown a detection limit of 4.3×10 −6 mmolL −1 and 3.5.10 −5 mmolL −1 , respectively. The sensor has exhibited a response time of 35min for MIP-LE-1 and 120min for MIP-LE-2. They are stable for more than three months.