A portable electrochemical sensor for caffeine and (-)epigallocatechin gallate (EGCG) based on molecularly imprinted poly(ethylene-co-vinyl-alcohol) recognition element

I. Cheng Chung, Chih Chun Chang, Han Sheng Chiu, Shih Fan Jiang, Mei Hwa Lee, Bin Da Liu, Chun Yueh Huang, Hung Yin Lin

研究成果: Conference contribution

5 引文 斯高帕斯(Scopus)

摘要

The U.S. FDA allows a maximum of 72 mg of caffeine per 12 oz. serving (6mg / oz) and the tolerance to sleep disruption effects of caffeine develops after consuming 400 mg/day of caffeine 3 times for a week. However, it is still hard for people to estimate how much caffeine is intake daily. On the other hand, (-)epigallocatechin gallate (EGCG) is studied a potent antioxidant that may have therapeutic properties for anti-aging and cancer. Conventionally, both caffeine and EGCG could be measured by the protocols of high performance liquid chromatography (HPLC); however, high precision instruments are required. In this work, the caffeine and EGCG are used as the target molecules and then imprinted into poly(ethylene-co-vinyl alcohol) via solvent evaporation. Target molecules on membrane are then removal, and the membrane is used as the sensing element for electrochemical urinalysis. From the cyclic voltammetry measurement of the caffeine, the peak oxidation potential is shifted from 0.36 to 0.38V when the final concentration of caffeine is from 0.01 to 1 mg/mL, and the highest current density is about 0.18 μA/cm2. This molecularly imprinted polymeric coated electrode is potential employed as a home-care system.

原文English
主出版物標題INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings
頁面362-363
頁數2
DOIs
出版狀態Published - 2010 五月 5
事件2010 3rd International Nanoelectronics Conference, INEC 2010 - Hongkong, China
持續時間: 2010 一月 32010 一月 8

出版系列

名字INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings

Other

Other2010 3rd International Nanoelectronics Conference, INEC 2010
國家/地區China
城市Hongkong
期間10-01-0310-01-08

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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