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首页> 外文期刊>RSC Advances >Simultaneous electrochemical determination of acetaminophen, caffeine and ascorbic acid using a new electrochemical sensor based on CuO-graphene nanocomposite
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Simultaneous electrochemical determination of acetaminophen, caffeine and ascorbic acid using a new electrochemical sensor based on CuO-graphene nanocomposite

机译：基于CuO-石墨烯纳米复合材料的新型电化学传感器同时对乙酰氨基酚，咖啡因和抗坏血酸的电化学测定

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摘要

A new nanocomposite based on CuO nanoparticles/graphene nanosheets was prepared and used as a new electrode material for the simultaneous determination of acetaminophen, caffeine and ascorbic acid. CuO nanoparticles were supported on graphene nanosheets by a simple method. This nanostructure was characterized by different techniques including scanning electron microscopy, X-ray diffraction, energy dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy. The high electrochemical activity, fast electron transfer rate, high surface area and good antifouling properties of the synthesized nanostructure enhanced the oxidation peak currents and reduced the peak potentials of acetaminophen, caffeine and ascorbic acid at the surface of the proposed sensor. Simultaneous determination of analytes was explored using differential pulse voltammetry. A linear range of 0.025-5.3 mu mol L-1 was achieved for acetaminophen, caffeine and ascorbic acid with detection limits of 0.008, 0.010 and 0.011 mu mol L-1, respectively. Finally, the proposed method was used for their determination in blood serum, urine and pharmaceutical samples.
机译：制备了一种基于CuO纳米颗粒/石墨烯纳米片的新型纳米复合材料，并将其用作同时测定对乙酰氨基酚，咖啡因和抗坏血酸的新型电极材料。通过简单的方法将CuO纳米颗粒负载在石墨烯纳米片上。该纳米结构通过包括扫描电子显微镜，X射线衍射，能量色散X射线光谱和傅里叶变换红外光谱的不同技术来表征。所合成纳米结构的高电化学活性，快速的电子传输速率，高表面积和良好的防污性能增强了所提出传感器表面的氧化峰电流并降低了对乙酰氨基酚，咖啡因和抗坏血酸的峰电位。使用差分脉冲伏安法探索了同时测定分析物的方法。对乙酰氨基酚，咖啡因和抗坏血酸的线性范围为0.025-5.3μmolL-1，检出限分别为0.008、0.010和0.011μmolL-1。最后，该方法用于测定血清，尿液和药物样品中的含量。

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