TY - JOUR
T1 - Fabrication of a polymer/mediator composite modified electrode and its application to electrochemical detection of iodate
AU - Li, Ta Jen
AU - Lin, Chia Yu
AU - Balamurugan, A.
AU - Kung, Chung Wei
AU - Wang, Jen Yuan
AU - Hu, Chih Wei
AU - Wang, Chun Chieh
AU - Chen, Po Yen
AU - Vittal, R.
AU - Ho, Kuo Chuan
N1 - Funding Information:
This work is sponsored by the National Science Council of Taiwan.
PY - 2011
Y1 - 2011
N2 - A polymer/mediator composite modified glassy carbon electrode (GCE) is fabricated for electrochemical detection of iodate (IO 3 -). Flavin adenine dinucleotide (FAD) is chosen as mediator for sensing iodate, and 3,4 ethylenedioxythiophene (EDOT) is chosen for entrapping FAD and forming a conducting polymeric matrix, poly(3,4 ethylenedioxythiophene) (PEDOT). The PEDOT/FAD modification layer is electrodeposited on the GCE by cyclic voltammetric (CV) method. It is noted that FAD can enhance the electrodeposition of PEDOT, and possible reasons are proposed to explain this phenomenon. The optimal cycle number for preparing the modified electrode is determined to be 9. The relationship between the formal potential of FAD and the pH value is studied. Two slopes, 60.4 and 29.2 mV per pH unit, are recorded in the ranges of 1.5 ≦ pH ≦ 8.5 and 8.5 ≦ pH ≦ 11.5, respectively. Additionally, it is found that the oxidation current of iodate increases significantly with the decrease of pH value.
AB - A polymer/mediator composite modified glassy carbon electrode (GCE) is fabricated for electrochemical detection of iodate (IO 3 -). Flavin adenine dinucleotide (FAD) is chosen as mediator for sensing iodate, and 3,4 ethylenedioxythiophene (EDOT) is chosen for entrapping FAD and forming a conducting polymeric matrix, poly(3,4 ethylenedioxythiophene) (PEDOT). The PEDOT/FAD modification layer is electrodeposited on the GCE by cyclic voltammetric (CV) method. It is noted that FAD can enhance the electrodeposition of PEDOT, and possible reasons are proposed to explain this phenomenon. The optimal cycle number for preparing the modified electrode is determined to be 9. The relationship between the formal potential of FAD and the pH value is studied. Two slopes, 60.4 and 29.2 mV per pH unit, are recorded in the ranges of 1.5 ≦ pH ≦ 8.5 and 8.5 ≦ pH ≦ 11.5, respectively. Additionally, it is found that the oxidation current of iodate increases significantly with the decrease of pH value.
UR - https://www.scopus.com/pages/publications/84863165112
UR - https://www.scopus.com/pages/publications/84863165112#tab=citedBy
U2 - 10.1016/j.proeng.2011.12.359
DO - 10.1016/j.proeng.2011.12.359
M3 - Conference article
AN - SCOPUS:84863165112
SN - 1877-7058
VL - 25
SP - 1453
EP - 1456
JO - Procedia Engineering
JF - Procedia Engineering
T2 - 25th Eurosensors Conference
Y2 - 4 September 2011 through 7 September 2011
ER -