Voltammetric determination of tert-Butylhydroquinone in food samples using carbon paste electrode modified with Au nanoparticle and ionic liquid

Abstract Electrochemical determination of tert-Butylhydroquinone was investigated at surface of carbon paste electrode modified with Au nanoparticle and 1-methyl-3-octylimidazolium tetrafluoroborate as sensor. The Au nanoparticle was biosynthesized by Nettles extract and its morphological structure was characterized by TEM method. The modified electrode (carbon paste electrode modified with Au nanoparticle and 1-methyl-3-octylimidazolium tetrafluoroborate) accelerated the oxidation reaction of tert-Butylhydroquinone as food antioxidant. In the optimum condition, the linear dynamic range 5.0 nM-450µM with detection limit 1.0 nM was obtained for determination of tert-Butylhydroquinone. The fabricated sensor of was successfully used for analysis of tert-Butylhydroquinone in food samples. Keywords: tert-Butylhydroquinone, Au nanoparticle, Biosynthesis, Electrochemical sensor, 1-methyl-3-octylimidazolium tetrafluoroborate