Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (22): 2585-2591. Previous Articles     Next Articles

Full Papers

黄芩素在聚-L-赖氨酸修饰电极上的电化学研究

杨 波,胡芳弟,魏金萍,王春明   

  1. (兰州大学化学化工学院 兰州 730000)
  • 投稿日期:2009-05-16 修回日期:2009-06-20 发布日期:2009-07-20
  • 通讯作者: 王春明 E-mail:wangcm@lzu.edu.cn
  • 基金资助:

    国家自然科学基金(NO.20775030)资助

Electrochemical Study on Baicalein at Poly-L-lysine Modified Glass Carbon Electrode

Yang, Bo,Hu, Fangdi,Wei, Jinping,Wang, Chunming   

  1. (Department of Chemistry, Lanzhou University, Lanzhou 730000)
  • Received:2009-05-16 Revised:2009-06-20 Published:2009-07-20

The electrochemical behavior of baicalein (BAI) was investigated at a glass carbon electrode (GCE) and a poly-L-lysine modified glass carbon electrode (PLL/GCE). The result showed that a pair of reversible redox peaks that did not emerge at GCE was observed at PLL/GCE, which indicated that PLL/GCE performed effective electrochemical response to BAI. Under optimal conditions, a good linear relationship between the anodic peak current and concentration was obtained in the range of 5.0×10-7~1.0×10-5 mol/L with the detection limit of 4.8×10-8 mol/L (S/N=3). The responses of repeated measurements at the renewed surface of the PLL/GCE were examined with relative standard deviation of 4.3% (n=10), respectively, indicating that the chemically modified electrode showed excellent reproducibility. The proposed method has been used to determine baicalein concentration in urine samples with satisfactory results.

Key words: electrochemistry, baicalein, poly-L-lysine