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化学学报
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化学学报 ›› 2012, Vol. 70 ›› Issue (06): 735-740.DOI: 10.6023/A1110282 上一篇    下一篇

研究论文

石墨烯/铁氰化钴复合膜修饰玻碳电极同时测定对苯二酚、邻苯二酚和间苯二酚

黄克靖, 余晟, 王兰, 甘甜, 李梅   

  1. 信阳师范学院化学化工学院 信阳 464000
  • 投稿日期:2011-10-28 修回日期:2011-12-09 发布日期:2012-01-31
  • 通讯作者: 黄克靖
  • 基金资助:

    河南省高校科技创新人才基金项目(No. 2010HASTIT025)和河南省科技创新杰出青年基金(No. 104100510020)资助项目.

Simultaneous Determination of Hydroquinone, Catechol and Resorcinol Based on Graphene/Cobalt Hexacyanoferrate Modified Glassy Carbon Electrode

Huang Kejing, Yu Sheng, Wang Lan, Gan Tian, Li Mei   

  1. Department of Chemistry, Xinyang Normal University, Xinyang 464000
  • Received:2011-10-28 Revised:2011-12-09 Published:2012-01-31
  • Supported by:

    Project supported by Program for Science and Technology Innovation Talents in Universities of Henan Province (No. 2010HASTIT025) and Excellent Youth Foundation of Henan Scientific Committee (No. 104100510020).

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被引次数

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采用滴涂法和电沉积法制备了石墨烯/铁氰化钴复合膜修饰玻碳电极. 用扫描电镜对该纳米复合膜进行了表征.用循环伏安法研究了对苯二酚(HQ)、邻苯二酚(CT)和间苯二酚(RS)在修饰电极上的电化学行为. 实验结果表明, 相对于裸玻碳电极和石墨烯修饰电极, HQ, CT 和RS 在石墨烯/铁氰化钴修饰电极上的氧化峰电流显著提高. 利用差分脉冲伏安法测定, HQ, CT 和RS 分别在1.0×10－6～1.5×10－4 mol/L, 1.0×10－6～2.0×10－4 mol/L 和3.5×10－6～2.5×10－4 mol/L浓度范围内与氧化峰电流呈良好的线性关系, 相关系数分别为0.991, 0.993 和0.992. 信噪比为3 时, HQ, CT 和RS 检出限分别为2.0×10－7, 2.1×10－7 和3.5×10－7 mol/L. 将该方法用于水样分析, 回收率为95.6%～106.1%.

关键词: 石墨烯, 铁氰化钴, 对苯二酚, 邻苯二酚, 间苯二酚, 同时测定

Graphene was coated on glassy carbon electrode (GCE) and cobalt hexacyanoferrate was then electrodeposited on the modified electrode to fabricate electrochemical sensor. Scanning electron microscope was used to characterize the nano-composite film. The electrochemical behaviors of hydroquinone (HQ), catechol (CT) and resorcinol (RS) on the modified electrode were investigated by cyclic voltammetry. The oxidation currents of CT, RS and HQ increased remarkably compared with those obtained at the bare GCE and graphene modified GCE. Differential pulse voltammetry was used for the simultaneous determination of CT, RS and HQ in their ternary mixture. The concentration of HQ, CT and RS showed good linear relationships with the oxidation peak current in the range of 1.0×10－6～1.5×10－4 mol/L, 1.0×10－6～ 2.0×10－4 mol/L and 3.5×10－6～2.5×10－4 mol/L, with correlation coefficients of R＝0.991, 0.993 and 0.992, respectively. The limits of detection for HQ, CT and RS were 2.0×10－7, 2.1×10－7 and 3.5×10－7 mol/L (S/N＝3), respectively. The developed method was used to determination of water samples with recoveries of 95.6%～106.1%.

Key words: graphene, cobalt hexacyanoferrate, hydroquinone, catechol, resorcinol, simultaneous determin ation