Silica-Modified Electrodes for Electrochemical Detection of Malachite Green,Electroanalysis

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Silica-Modified Electrodes for Electrochemical Detection of Malachite Green
Electroanalysis ( IF 2.7 ) Pub Date : 2017-09-06 , DOI: 10.1002/elan.201700400
Ana Maria Sacara ₁ , Valentina Nairi ₂ , Andrea Salis ₂ , Graziella Liana Turdean ₁ , Liana Maria Muresan ₁

Affiliation

New silica-modified glassy carbon electrodes prepared with three different sorts of ordered mesoporous silica (OMS) were characterized and tested for the electrochemical detection of Malachite Green (MG). The electrodes were prepared by drop casting using silica suspensions and, for stability sake, a Nafion coating was deposited on the electrode top by the same technique. Square wave anodic stripping voltammetry was used to investigate the effect of various experimental parameters (deposition time, solution pH, silica type and concentration) on the performance of the modified electrodes. The best electrode (GC/MCM-41-NH2/Nafion) with detection limit 0.36 μM, sensitivity 0.164±0.003 A/M; linear domain 1–6 μM was applied to detect MG in a commercial product commonly used as biocide in aquaria for ornamental fish.

中文翻译：

用于电化学检测孔雀石绿的二氧化硅改性电极

用三种不同种类的有序介孔二氧化硅 (OMS) 制备的新型二氧化硅改性玻璃碳电极进行了表征并测试了孔雀石绿 (MG) 的电化学检测。使用二氧化硅悬浮液通过滴铸制备电极，并且为了稳定性起见，通过相同的技术在电极顶部沉积了 Nafion 涂层。方波阳极溶出伏安法用于研究各种实验参数（沉积时间、溶液 pH 值、二氧化硅类型和浓度）对修饰电极性能的影响。最佳电极（GC/MCM-41-NH2/Nafion），检出限0.36 μM，灵敏度0.164±0.003 A/M；线性域 1-6 μM 用于检测商业产品中的 MG，该产品通常用作观赏鱼的水族箱中的杀菌剂。

更新日期：2017-09-06

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