caa a22 4500 445881313 CHVBK 20180317145544.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00604-011-0635-y doi (NATIONALLICENCE)springer-10.1007/s00604-011-0635-y Voltammetric sensor for caffeine based on a glassy carbon electrode modified with Nafion and graphene oxide [Elektronische Daten] [Fangyuan Zhao, Fei Wang, Weining Zhao, Jing Zhou, Yang Liu, Lina Zou, Baoxian Ye] We report on a voltammetric sensor for caffeine that is based on a glassy carbon electrode modified with Nafion and graphene oxide (GO). Itexhibits a good affinity for caffeine (resulting from the presence of Nafion), and excellent electrochemical response (resulting from the pressence of GO) for the oxidation of caffeine. The electrode enables the determination of caffeine in the range from4.0 × 10−7 to8.0 × 10−5molL−1, with a detection limit of 2.0 × 10−7molL−1. The sensor displays good stability, reproducibility, and high sensitivity. It was successfully applied to the quantitative determination of caffeine in beverages. Figure A new electrochemical sensor, based on graphene oxide (GO)-Nafion composite film modified glassy carbon electrode (GCE), was developed and used for detection of trace amounts of caffeine in a wide range with a low detection limit. Springer-Verlag, 2011 Caffeine nationallicence Nafion nationallicence Graphene oxide nationallicence Modified electrode nationallicence Voltammetry nationallicence Zhao Fangyuan Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut Wang Fei Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut Zhao Weining Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut Zhou Jing Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut Liu Yang Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut Zou Lina Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut Ye Baoxian Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut Microchimica Acta Springer Vienna 174/3-4(2011-09-01), 383-390 0026-3672 174:3-4<383 2011 174 604 https://doi.org/10.1007/s00604-011-0635-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0635-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhao Fangyuan Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut NATIONALLICENCE 700 1- Wang Fei Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Weining Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhou Jing Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut NATIONALLICENCE 700 1- Liu Yang Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zou Lina Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut NATIONALLICENCE 700 1- Ye Baoxian Department of Chemistry, Zhengzhou University, 450001, Zhengzhou, People's Republic of China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 174/3-4(2011-09-01), 383-390 0026-3672 174:3-4<383 2011 174 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer