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Reference type: Journal
Authors: Zhang ZH, Li H, Liao HP, Nie LH, Yao SZ
Article Title: Effect of the extraction method on the MIP-sensor.
Publication date: 2005
Journal: Analytical Letters
Volume: 38
Issue: (2)
Page numbers: 203-217.
DOI: 10.1081/AL-200045105
Alternative URL: http://www.informaworld.com/10.1081/AL-200045105

Abstract: The effect of the extraction methods (conventional immersion extraction, ultrasonic-assisted extraction, microwave-assisted extraction, and Soxhlet extraction) on the molecularly imprinted polymer (MIP) sensor function has been investigated in this paper. The molecularly imprinted polymer was synthesized by copolymerizing template analyte (theophylline) with methacrylic acid in the presence of the crosslinker (ethylene glycol dimethacrylate) in tetrahydrofuran. Piezoelectric quartz crystal (PQC) sensors were modified with the MIP extracted by different methods. The electron microscopy (SEM) showed that the diameters of the polymer are 0.08 similar to 0.15 μm. Response performance, selectivity, and recovery of the different sensors were compared and influencing factors were studied. From all the methods tested, microwave-assisted extraction is the fastest method; the frequency response of the sensor modified with the MIP extracted by Soxhlet method is higher than the other extraction methods
Template and target information: theophylline
Author keywords: extraction method, molecularly imprinted polymer, piezoelectric quartz crystal, sensor, theophylline

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