“…[1][2][3][4] Therefore, U.S.A. has forbidden the use of amaranth in food, and China does not allow amounts of this additive in so drinks over the maximum limit of 0.05 g kg À1 (GB2760-2014). [5][6][7] Amaranth has recently been determined by numerous methods, namely spectrophotometry, 8,9 high performance liquid chromatography (HPLC), 10,11 thin layer chromatography (TCL), 12 electrochemical analysis, [13][14][15][16][17][18] uorescence, 19,20 colorimetry, 21 and electrophoresis. 22 Electrochemical method is superior to the aforementioned methods due to the excellent merits, e.g., easy operation, low cost, simple equipment requirement, and quick response.…”