The electrodeposition of reduced graphene oxide and carbon nanotube (ErGO/CNTs) composite film modified electrode has been fabricated by electrochemical reduction of graphene oxide (GO) and MWNTs composite film coated on the surface of glassy carbon electrode (GCE). The results show that in 0.2 mol/L NaAc-HAc (pH= 4.5) buffer solution, cryptotanshinone produced a pair of sensitive redox peaks with peak potentials of -0.180 V and -0.207 V (vs SCE). The electrode reaction was two electrons and two protons participate in the completely reversible process of adsorption control. The ErGO/CNTs membrane modified electrode has obvious catalytic and sensitizing effects on the redox of cryptotanshinone. Differential pulse voltammetry (DPV) is used to investigate the relationship between oxidation peak current and cryptotanshinone concentration. It is found that the oxidation current of cryptotanshinone is linear with its concentration in the range of 2.7 × 10^-8 ~1.3 × 10^-5 mol/L and the determination limit is 1.0 × 10^-8 mol/L, which can realize the electrochemical detection of cryptotanshinone in the drug.

中文翻译：

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基于电化学还原氧化石墨烯和碳纳米管复合膜修饰玻碳电极的隐丹参酮敏感电化学传感器

还原氧化石墨烯和碳纳米管（ErGO / CNTs）复合膜修饰电极的电沉积是通过电化学还原涂覆在玻璃碳电极（GCE）表面的氧化石墨烯（GO）和MWNTs复合膜制备的。结果表明，在0.2 mol / L NaAc-HAc（pH = 4.5）缓冲溶液中，隐丹参酮产生一对敏感的氧化还原峰，峰电位为-0.180 V和-0.207 V（vs SCE）。电极反应是两个电子和两个质子参与完全可逆的吸附控制过程。ErGO / CNTs膜修饰电极对隐丹参酮的氧化还原具有明显的催化和增敏作用。差分脉冲伏安法（DPV）用于研究氧化峰电流与隐丹参酮浓度之间的关系。^-8〜1.3 ×10 ^-5 mol / L，测定下限为1.0×10 ^-8 mol / L，可实现药物中隐丹参酮的电化学检测。