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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 554-556Highly Selective Caffeine Coated-Wire Electrode...

Highly Selective Caffeine Coated-Wire Electrode Based on the Molecularly Imprinted Polymer

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Abstract:

The molecular imprinted polymer (MIP) was synthesized by precipitation polymerization with caffeine as template, methacrylic acid (MAA) as functional monomer and ethylene glycol dimethacrylate (EGDMA) as cross-linker. A selective electrode for the potentiometric determination of caffeine in the aqueous medium was developed using the MIP-modified coated-wire electrode. The electrode shows response for caffeine in a concentration range of 1.0×10-8 to 1.0×10-5 M with a lower detection limit of 5.0×10-9 M. The electrode can be used for more than 100 times. The response time is 15 s and the signal is constant in the pH range 6.4 to 9.0. The electrode can be successfully applied for the monitoring of caffeine in syrup sample.

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Advances in Chemistry Research II

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Periodical:

Advanced Materials Research (Volumes 554-556)

Pages:

369-373

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.554-556.369

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Online since:

July 2012

Authors:

Xiao Jun Guo, Shou Lian Wei, Yong Liu

Keywords:

Caffeine, Molecular Imprinted Polymer (MIP), Potentiometric Determination, Syrup Sample

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