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Reference type: Journal
Authors: Chang JH, Bahethan B, Muhammad T, Yakup B, Abbas M
Article Title: A Simple and Selective Fluorescent Sensor Chip for Indole-3-Butyric Acid in Mung Bean Sprouts Based on Molecularly Imprinted Polymer Coatings.
Publication date: 2017
Journal: Sensors
Volume: 17
Issue: (9)
Page numbers: ArticleNo1954.
DOI: 10.3390/s17091954
Alternative URL: http://www.mdpi.com/1424-8220/17/9/1954

Abstract: In this paper, we report the preparation of molecularly imprinted polymer coatings on quartz chips for selective solid-phase microextraction and fluorescence sensing of the auxin, indole-3-butyric acid. The multiple copolymerization method was used to prepare polymer coatings on silylated quartz chips. The polymer preparation conditions (e.g., the solvent, monomer, and cross-linker) were investigated systemically to enhance the binding performance of the imprinted coatings. Direct solid-phase fluorescence measurements on the chips facilitated monitoring changes in coating performance. The average binding capacity of an imprinted polymer coated chip was approximately 152.9 μg, which was higher than that of a non-imprinted polymer coated chip (60.8 μg); the imprinted coatings showed the highest binding to IBA among the structural analogues, indicating that the coatings possess high selectivity toward the template molecule. The developed method was used for the determination of the auxin in mung bean extraction, and the recovery was found to be in the range of 91.5% to 97.5%, with an RSD (n = 3) of less than 7.4%. Thus, the present study provides a simple method for fabricating a fluorescent sensor chip for selective analysis
Template and target information: indole-3-butyric acid, auxin
Author keywords: indole-3-butyric acid, polymer coating, molecularly imprinted polymer, fluorescence detection, sensor chip

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