Proceedings title: Advanced Materials Research
Editors: Chen SA, Liu ZT, Zeng QZ
Publisher: Trans Tech Publications
Volume number: 554-556
Conference information: Advances in Chemistry Research II
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 x 10-8 to 1.0 x 10-5 M with a lower detection limit of 5.0 x 10-9 M. The electrode can be used for more than 100 times. The response time is 15s 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.
Template and target information: caffeine
Author keywords: caffeine, molecular imprinted polymer (MIP), Potentiometric Determination, Syrup Sample