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Overoxidized polyimidazole/graphene oxide copolymer modified electrode for the simultaneous determination of ascorbic acid, dopamine, uric acid, guanine and adenine.
Biosens Bioelectron. 2014 Jul 15; 57:232-8.BB

Abstract

In the present work, a novel strategy based on overoxidized polyimidazole (PImox) and graphene oxide (GO) copolymer modified electrode was proposed for the simultaneous determination of ascorbic acid (AA), dopamine (DA), uric acid (UA), guanine (G) and adenine (A). The copolymer was characterized by the scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). Due to the synergistic effects between PImox and GO, the proposed electrode exhibited excellent electrochemical catalytic activities and high selectivity and sensitivity toward the oxidation of AA, DA, UA, G and A. The peak separations between AA and DA, AA and UA, UA and G, and G and A were 140 mV, 200 mV, 380 mV and 300 mV, respectively. The linear response ranges for AA, DA, UA, G and A were 75-2275 μM, 12-278 μM, 3.6-249.6 μM, 3.3-103.3 μM and 9.6-215 μM, respectively, and corresponding detection limits were 18 μM, 0.63 μM, 0.59 μM, 0.48 μM and 1.28 μM.

Authors+Show Affiliations

Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China. Electronic address: shapingw@swu.edu.cn.Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China. Electronic address: cshong@swu.edu.cn.Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24594589

Citation

Liu, Xiaofang, et al. "Overoxidized Polyimidazole/graphene Oxide Copolymer Modified Electrode for the Simultaneous Determination of Ascorbic Acid, Dopamine, Uric Acid, Guanine and Adenine." Biosensors & Bioelectronics, vol. 57, 2014, pp. 232-8.
Liu X, Zhang L, Wei S, et al. Overoxidized polyimidazole/graphene oxide copolymer modified electrode for the simultaneous determination of ascorbic acid, dopamine, uric acid, guanine and adenine. Biosens Bioelectron. 2014;57:232-8.
Liu, X., Zhang, L., Wei, S., Chen, S., Ou, X., & Lu, Q. (2014). Overoxidized polyimidazole/graphene oxide copolymer modified electrode for the simultaneous determination of ascorbic acid, dopamine, uric acid, guanine and adenine. Biosensors & Bioelectronics, 57, 232-8. https://doi.org/10.1016/j.bios.2014.02.017
Liu X, et al. Overoxidized Polyimidazole/graphene Oxide Copolymer Modified Electrode for the Simultaneous Determination of Ascorbic Acid, Dopamine, Uric Acid, Guanine and Adenine. Biosens Bioelectron. 2014 Jul 15;57:232-8. PubMed PMID: 24594589.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Overoxidized polyimidazole/graphene oxide copolymer modified electrode for the simultaneous determination of ascorbic acid, dopamine, uric acid, guanine and adenine. AU - Liu,Xiaofang, AU - Zhang,Ling, AU - Wei,Shaping, AU - Chen,Shihong, AU - Ou,Xin, AU - Lu,Qiyi, Y1 - 2014/02/20/ PY - 2014/01/12/received PY - 2014/02/06/revised PY - 2014/02/09/accepted PY - 2014/3/6/entrez PY - 2014/3/7/pubmed PY - 2014/11/11/medline KW - Graphene oxide KW - Polyimidazole KW - Simultaneous determination KW - Small biomolecules SP - 232 EP - 8 JF - Biosensors & bioelectronics JO - Biosens Bioelectron VL - 57 N2 - In the present work, a novel strategy based on overoxidized polyimidazole (PImox) and graphene oxide (GO) copolymer modified electrode was proposed for the simultaneous determination of ascorbic acid (AA), dopamine (DA), uric acid (UA), guanine (G) and adenine (A). The copolymer was characterized by the scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). Due to the synergistic effects between PImox and GO, the proposed electrode exhibited excellent electrochemical catalytic activities and high selectivity and sensitivity toward the oxidation of AA, DA, UA, G and A. The peak separations between AA and DA, AA and UA, UA and G, and G and A were 140 mV, 200 mV, 380 mV and 300 mV, respectively. The linear response ranges for AA, DA, UA, G and A were 75-2275 μM, 12-278 μM, 3.6-249.6 μM, 3.3-103.3 μM and 9.6-215 μM, respectively, and corresponding detection limits were 18 μM, 0.63 μM, 0.59 μM, 0.48 μM and 1.28 μM. SN - 1873-4235 UR - https://www.unboundmedicine.com/medline/citation/24594589/Overoxidized_polyimidazole/graphene_oxide_copolymer_modified_electrode_for_the_simultaneous_determination_of_ascorbic_acid_dopamine_uric_acid_guanine_and_adenine_ DB - PRIME DP - Unbound Medicine ER -