Shabalina Anastasiia V, Svetlichnyi Valery A, Ryzhinskaya Ksenia A, Lapin Ivan N
Siberian Physical-Technical Institute of Tomsk State University.
Anal Sci. 2017;33(12):1415-1419. doi: 10.2116/analsci.33.1415.
A carbon screen-printed electrode was modified with copper nanoparticles from their dispersion obtained via pulsed laser ablation of a copper target in ethanol. The modified electrode exhibited activity in ascorbic acid electrochemical oxidation, giving an anodic current peak on voltammograms. Linear sweep and cyclic voltammetry have shown a linear dependence of the signal (both peak height and peak area) on the ascorbic acid concentration. The linear range from 1 to 250 μM of ascorbic acid was studied, and the detection limit was experimentally found to be 0.5 μM. The amperometric response to the addition of ascorbic acid portions into the solution was recorded. For the case of the simultaneous presence of ascorbic acid and glucose, two separate signal were obtained. Thus, the modified electrodes are characterized by the following advantages: disposable use; small amount of the samples required for the analysis; lower price (cheap copper is used); simple and easy modification procedure; good metrological characteristics; selectivity.
通过在乙醇中对铜靶进行脉冲激光烧蚀获得的铜纳米颗粒分散液对碳丝网印刷电极进行了修饰。修饰后的电极在抗坏血酸的电化学氧化中表现出活性，在伏安图上给出一个阳极电流峰。线性扫描伏安法和循环伏安法表明信号（峰高和峰面积）与抗坏血酸浓度呈线性关系。研究了抗坏血酸在1至250 μM的线性范围，实验发现检测限为0.5 μM。记录了向溶液中添加抗坏血酸部分时的安培响应。对于抗坏血酸和葡萄糖同时存在的情况，获得了两个独立的信号。因此，修饰电极具有以下优点：一次性使用；分析所需样品量少；价格较低（使用廉价的铜）；修饰过程简单易行；良好的计量特性；选择性。
