A novel amperometric sensor for the detection of difenidol hydrochloride based on the modification of Ru(bpy)(3)(2+)
Wen Pan1, Xiaoli Chen, Manli Guo
1College of Chemistry & Chemical Engineering, Hunan University, Changsha, China.
Abstract:
An amperometric sensor for the detection of difenidol, a tertiary amine-containing analyte, was proposed. Ruthenium(II) tris(bipyridine)/multi-walled carbon nanotubes/Nafion composite film was suggested to modify the glassy carbon electrode. The modified electrode was shown to be an excellent amperometric sensor for the detection of difenidol hydrochloride. The linear range is from 1.0x10(-6) to 3.3x10(-5)M with a correlation coefficient of 0.998. The limit of detection was 5x10(-7)M, which was obtained through experimental determination based on a signal-to-noise ratio of three. The sensor was employed to the determination of the active ingredients in the tablets containing difenidol hydrochloride.
