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Silica-modified Electrodes for Electrochemical Detection of Malachite Green

机译:孔雀石绿色电化学检测二氧化硅改性电极

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摘要

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 mu M, sensitivity 0.164 +/- 0.003 A/M; linear domain 1-6 mu M was applied to detect MG in a commercial product commonly used as biocide in aquaria for ornamental fish.
机译:用三种不同排序的介孔二氧化硅(OMS)制备的新的二氧化硅改性玻璃电极进行了特征和测试,用于孔雀石绿(Mg)的电化学检测。 通过使用二氧化硅悬浮液通过液滴铸件制备电极,并且对于稳定性缘故,通过相同的技术将Nafion涂层沉积在电极顶部上。 方波阳极剥离伏安法用于研究各种实验参数(沉积时间,溶液pH,二氧化硅型和浓度)对改进电极的性能的影响。 检测限0.36 mu m的最佳电极(GC / MCM-41-NH2 / NAFION),灵敏度0.164 +/- 0.003 a / m; 线性结构域1-6μm被应用于检测常用作为观赏鱼的水族馆杀菌剂的商业产品中的Mg。

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