Journal
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
Volume 12, Issue 3, Pages 2552-2562Publisher
ESG
DOI: 10.20964/2017.03.02
Keywords
Caffeine; Poly(diallyldimethylammonium chloride); Multi-walled carbon nanotube; Oolong tea; Electrocheimcal sensor
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Funding
- Key Laboratory of Protection and Utilization of Wulingshan Region's Unique Plant Resources of Chongqing
- National Natural Science Foundation of China [31470568]
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In the present work, a voltammetric sensor for detection of caffeine was prepared by modifying a glassy carbon electrode with Nafion and PDDA-MWCNT. This sensor shows high sensitivity for caffeine determination in the range from 0.3 to 80 mu M, and the detection limit is 0.05 mu M. Moreover, the sensor exhibits good stability, reproducibility and high activity for electrochemical oxidation of caffeine. Thus, it is available for the quantitative analysis of caffeine in Oolong tea.
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