ZnO nanoparticle modified carbon paste electrode as a sensor for electrochemical determination of tert-butylhydroquinone in food samples

A fast response voltammetric sensor based on zno nanoparticles (zno/nps) carbon paste electrode (zno/nps/cpe) is suggested for the determination of tert-butylhydroquinone in the aqueous buffer solution. zno nanoparticles synthesized by direct chemical precipitation method and characterized with x-ray diffraction (xrd) method. in the second step,application of the zno/nps for the preparation of modified carbon paste electrode was investigated. at the optimum condition (ph 7.0),the oxidation signals of tert-butylhydroquinone increased linearly with its concentration in the ranges of 1.0–750 μm. the detection limit for tert-butylhydroquinone was 0.7 μm. the zno/nps/cpe was used for the determination of tert-butylhydroquinone in food samples such as sesame and soybean oil. © 2016 by cee (center of excellence in electrochemistry).