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Reference type: Journal
Authors: Gao N, Dong JW, Liu M, Ning BA, Cheng CN, Guo C, Zhou CH, Peng Y, Bai JL, Gao ZX
Article Title: Development of molecularly imprinted polymer films used for detection of profenofos based on a quartz crystal microbalance sensor.
Publication date: 2012
Journal: Analyst
Volume: 137
Issue: (5)
Page numbers: 1252-1258.
DOI: 10.1039/C2AN16120F

Abstract: A quartz crystal microbalance (QCM) sensor based on molecularly imprinted ultra-thin films was developed for detecting profenofos in real samples. Films prepared by physical entrapment (MIP-A) and in situ self-assembly (MIP-B) were compared. The results indicated that the best sensing signal was obtained through the in situ self-assembly method. The QCM sensor chip was pretreated with 11-mercaptoundecanoic acid (MUA) to form a self-assembled monolayer (SAM), and then polymer films were immobilized directly on the SAM using surface-initiated radical polymerization. In this paper, all detection experiments were taken in air. The reaction was processed in solution, and the electrode was washed with deionized water and dried with N2 before QCM measurement. The film was characterized by a scanning electron microscope (SEM), AC impedance and cyclic voltammetry. Analysis of the QCM response in the presence of different concentrations of profenofos showed a good linear correlation during 1.0 x 10-8 to 1.0 x 10-5 mg mL-1 (y = 5log x + 42.5, R = 0.9960) and 1.0 x 10-5 to 1.0 x 10-3 mg mL-1 (y = 25.86log x + 146, R = 0.9959), respectively. The MIP-QCM sensor was used to detect profenofos in tap water, and showed good recovery and repeatability
Template and target information: profenofos

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