Silica‐modified Electrodes for Electrochemical Detection of Malachite Green

Abstract

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.

Glassy Carbon Electrodes Modified with Ordered Mesoporous Silica for the Electrochemical Detection of Cadmium Ions

“…It was subsequently washed in an ultrasound bath with distilled water to rinse off any trace of alumina. Mesoporous silica suspensions were stabilized by means of sodium dodecyl sulfate (SDS), 35 which allowed to obtain a homogeneous suspension and to prevent precipitation and aggregation of silica particles. The suspensions (5 μL) were applied by drop-casting on the electrode’s active surface and dried.…”

“…In this context, we recently compared SBA-15 and MCM-41 as matrices for the modification of glassy carbon (GC) electrodes for the voltammetric detection of malachite green. 35…”

High-Precision and Low-Cost Wireless 16-Channel Measurement System for Malachite Green Detection

“…In recent years, electrochemical detection method [6,7] has played an important role in antibiotics detection, which enjoys the advantages of high accuracy, strong analytical ability and fast speed. A complementary metal-oxide-semiconductor (CMOS) single-chip electrochemical array system has been proposed in Reference [8], which is suitable for the implementation of a fully integrated instrument-on-chip microsystem.…”

An Ordered Mesoporous Carbon Nanofiber Array for the Sensitive Electrochemical Detection of Malachite Green

“…MG is also used in the fish farming industry because it is well known as an antibacterial, antiseptic and antiprotozoal agent. However, studies have indicated that MG not only is a potential carcinogenic and mutagenic agent but also can cause Heinz body formation, cyanosis, an increased heart rate, quadriplegia, jaundice, vomiting and tissue necrosis . According to the European Union, the total amount of MG in animal‐derived food is limited to 2μg/kg.…”

“…However, studies have indicated that MG not only is a potential carcinogenic and mutagenic agent but also can cause Heinz body formation, cyanosis, an increased heart rate, quadriplegia, jaundice, vomiting and tissue necrosis. [1][2][3][4][5] According to the European Union, the total amount of MG in animal-derived food is limited to 2μg/kg. Many countries have banned the use of MG in aquaculture, but it is still used illegally because of its low cost and high effectiveness.…”