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Citation: XU Chunxuan, XIONG Xiaoqin, WU Yingying, MA Wenjie. Determination of Trace Amount of Mercury Using Poly(p-Aminobenzene Sulfonic Acid)/Graphene Modified Glassy Carbon Electrode[J]. Chinese Journal of Applied Chemistry, ;2011, 28(8): 969-973. doi: 10.3724/SP.J.1095.2011.00003 shu

Determination of Trace Amount of Mercury Using Poly(p-Aminobenzene Sulfonic Acid)/Graphene Modified Glassy Carbon Electrode

1.
College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000

Corresponding author: XU Chunxuan,
Received Date: 5 January 2011
Available Online: 15 March 2011
Fund Project: 河南省科技攻关(0524440059) (0524440059)河南省高校科技创新人才基金(2010HASTIT025)项目资助 (2010HASTIT025)

A poly(p-aminobenzene sulfonic acid)/graphene composite modified glassy carbon electrode(GCE) was fabricated and the electrochemical behaviors of mercury on the modified electrode were investigated.The results show that the electrochemical response of Hg²⁺ at the modified electrode is significantly improved compared with the bare GCE.After 5 min accumulation at -1.2 V in a 0.1 mol/L pH=4.0 PBS,the peak currents vary linearly with the concentration of Hg²⁺ over the range from 1.0×10^-6 to 5.0×10^-4 mol/L with the detection limit of 5.0×10^-7 mol/L.The correlation coefficiency is 0.995.Using this modified electrode,trace amounts of Hg²⁺ in water samples are determined with recoveries of 92.2%~105.2%.
- poly (p-aminobenzene sulfonic acid),
- graphene,
- differential pulse voltammetry,
- mercury,
- chemical sensor
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