Short Communication: Electrochemical Sensor Based on Single-Walled Carbon Nanotube-TiN Nannocomposites for Detecting Amaranth

Currently, as food additives, synthetic colourants have been drawn much attention. This paper studied the electrocatalytic oxidation of amaranth (AM), with a novel electrochemical sensor based on singlewalled carbon nanotube-Titanium nitride (SWCNT-TiN) nanocomposites modified glassy carbon electrode. Owing to the high accumulation effect and great catalytic capability of SWCNT-TiN nanocomposites, the developed sensor exhibited well-defined voltammetric peaks for AM. The peak currents of AM increased linearly with its concentration in the ranges of 0.1-100 μM. The detection limit is 40 nM. The developed sensor was successfully applied in the determination of AM in beverage samples. Results indicated that the developed sensor was fast, sensitive and reliable.