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首页> 外文期刊>RSC Advances >Carbon ceramic microelectrodes modified with buckyballs for simultaneous determination of redox-active biomolecules
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Carbon ceramic microelectrodes modified with buckyballs for simultaneous determination of redox-active biomolecules

机译：布基球修饰的碳陶瓷微电极，用于同时测定氧化还原活性生物分子

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摘要

In this report, simultaneous electrochemical determination of ascorbic acid (AA), dopamine (DA), uric acid (UA) and tryptophan (Trp) was achieved using buckyball-modified carbon ceramic microelectrodes (CCMEs). A concentration-dependent increase in anodic peak current signals was observed in comparison with those obtained at bare CCMEs. The optimal pH for simultaneous determination of a quaternary mixture of AA–DA–UA–Trp was determined to be pH 4. The peak separations for the mixture containing AA–DA–UA–Trp were well-defined at the scan rate of 50 mV s ~(?1) . The catalytic peak current obtained was linearly dependent on the AA, DA, UA and Trp concentrations in the range of 6.0–600, 6.0–600, 6.0–600 and 4.0–440 μM, respectively. The detection limits for AA, DA, UA and Trp were also determined to be 1.64, 0.82, 0.36 and 1.22 μM, respectively. The analytical performance of this sensor has also been challenged for simultaneous electrochemical detection of AA, DA, UA and Trp in real samples.
机译：在该报告中，使用布基球修饰的碳陶瓷微电极（CCME）可以同时电化学测定抗坏血酸（AA），多巴胺（DA），尿酸（UA）和色氨酸（Trp）。与在裸露的CCMEs上获得的相比，观察到阳极峰值电流信号的浓度依赖性增加。同时测定AA–DA–UA–Trp的四元混合物的最佳pH确定为pH4。在50 mV的扫描速率下，含有AA–DA–UA–Trp的混合物的峰分离得到明确定义s〜（？1）。所获得的催化峰值电流分别线性依赖于AA，DA，UA和Trp浓度，范围分别为6.0-600、6.0-600、6.0-600和4.0-440μM。 AA，DA，UA和Trp的检出限也分别确定为1.64、0.82、0.36和1.22μM。该传感器的分析性能还面临着同时进行实际样品中AA，DA，UA和Trp电化学检测的挑战。

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