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Citation: MA Xinying, WU Yifang, LI Xia. Preparation of Graphene-modified Electrode and Voltammetric Determination of Acetaminophen[J]. Chinese Journal of Applied Chemistry, ;2012, 29(7): 824-829. doi: 10.3724/SP.J.1095.2012.00350 shu

Preparation of Graphene-modified Electrode and Voltammetric Determination of Acetaminophen

1.
Department of Chemistry and Chemical Engineering, Heze University, Heze 274015, China

Corresponding author: MA Xinying,
Received Date: 10 August 2011
Available Online: 10 October 2011
Fund Project: 山东省高等学校科技计划项目(J10LB64) (J10LB64)山东省自然科学基金资助项目(2R2009BM003) (2R2009BM003)

A glassy carbon electrode was modified with graphene by casting.The modified electrode showed an excellent electrocatalytical effect on the oxidation of acetaminophen(ACOP).The voltammetric behavior and electrochemical analysis method of ACOP were studied on the modified electrode.The effect of pH value on the response of ACOP was studied in phosphate buffer solution(PBS).The results showed that the redox peak potential of ACOP shifted negatively with increasing pH value,and a pair of well-defined redox waves were obtained in PBS of pH=6.0.The oxidation peak currents of ACOP increased linearly with the concentration,in the range of 6.00×10^-7~4.00×10^-5 mol/L,the linear regression equation was i_pa(A)=3.00c+1.21×10^-5,with correlation coefficient 0.9940.The detection limit(S/N=3) was 5.00×10^-8 mol/L.The graphene modified electrode showed a good sensitivity,selectivity and stability.It was applied to the ACOP tablets analysis.
- chemically modified electrode,
- graphene,
- acetaminophen
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