Yin Zhao-Hui, Xu Qiao, Tu Yi, Zou Qiu-Ju, Yu Jiu-Hong, Zhao Yuan-Di
Key Laboratory of Biomedical Photonics of Ministry of Education, Wuhan National Laboratory for Optoelectronics, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China, 430074.
Bioelectrochemistry. 2008 Apr;72(2):155-60. doi: 10.1016/j.bioelechem.2008.01.005. Epub 2008 Jan 18.
In this article, the electrochemical behavior of emodin at multi-wall carbon nanotube modified glassy carbon electrodes (MWNTs/GCE) was studied. The result showed that MWNTs/GCE had high electrocatalytic activity for emodin. And the electrocatalytic redox process was a two-charge-two-proton process. Diffusion coefficient (D(R)) of 8.403 x 10(-5) cm(2) s(-1) of emodin was obtained. Further experiments demonstrated that the oxidative peaks increased linearly with emodin concentrations in the range of 1.0 x 10(-6) to 1.0 x 10(-4) M with a limit of detection of 3.0 x 10(-7) M. This electrochemical method was accurate and reliable, therefore, it might provide a novel way for emodin detection.
本文研究了大黄素在多壁碳纳米管修饰玻碳电极（MWNTs/GCE）上的电化学行为。结果表明，MWNTs/GCE对大黄素具有高电催化活性。且电催化氧化还原过程是一个双电荷双质子过程。获得了大黄素的扩散系数（D(R)）为8.403×10(-5) cm(2) s(-1)。进一步实验表明，在1.0×10(-6)至1.0×10(-4) M范围内，氧化峰电流与大黄素浓度呈线性关系，检测限为3.0×10(-7) M。该电化学方法准确可靠，因此可能为大黄素的检测提供一种新途径。
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