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Catechin plays a significant role in determining the level of astringency and taste of green tea. It has also certain health benefits which makes green tea very popular among mankind. This study reports the use of stainless steel electrode for the detection of catechin. The sensory evaluation of the electrode was compared with that of carbon paste and platinum electrode by means of cyclic voltammetry...
In this paper, six different grades of Assam CTC black tea liquor were discriminated by means of cyclic voltammetry. A 3-electrode configuration was used to study the voltammogram where Polyacrylamide/Exfoliated Graphite composite (PAM/EGC) was used as the working electrode. Data obtained from the tea samples were subjected to multivariate data analysis techniques viz. Radar plot, Box plot and Principal...
A biosensor for the detection of ascorbic acid is developed by preparing a carbon paste electrode (CPE) electrochemically deposited with Prussian blue (PB) and DNA adsorbed on its surface. Cyclic voltammetry (CV) was used to study the electrochemical properties of the biosensor. The successful electro-deposition of PB was confirmed using Raman Spectroscopy. From the results it was concluded that PB...
An integrated amperometric instrumentation system with on-chip electrodes for biosensor arrays is presented. The mixed-signal integrated circuit supports a variety of electrochemical measurement techniques including linear sweep, constant potential, cyclic and pulse voltammetry. Implemented in 0.5 μm CMOS, the 3×3 mm2 chip dissipates 22.5 mW for a 200 kHz clock. The highly programmable chip provides...
A versatile 4-channel bipotentiostat system for biochemical sensing is presented. A 1pA current resolution and 8 kHz bandwidth are suited for amperometric detection of neurotransmitters released by cells, monitored in a smart microfluidic culture chamber. Multiple electrochemical measurements can be carried out on arrays of microelectrodes. Key design issues are here discussed along with the results...
In this paper a virtual instrumentation based electronic tongue has been described by applying the principles of cyclic voltammetry. The set up consists of a three electrode system. A triangular pulse was applied as the input from a data acquisition card via an amplification and level shifter circuit and the voltage equivalent of the output current from the working solution was considered for data...
The design and experimental characterization of a potentiostat system based on a novel modular architecture are illustrated. This instrument enables three amperometric measurements in liquid (cyclic voltammetry, electrochemical impedance spectroscopy and impedance tracking in time domain) on interfacial systems whose dimensions can range from the millimeter down to the sub-micrometric scale. In particular...
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