Electrochemical behavior and the determination of furan in beverage samples using glassy carbon electrode

ABSTRACT

Furan is a possible human carcinogen in many types of foods. A new and sensitive electro analytical method for determination of furan has been developed and validated. The best condition for electrochemical response was obtained with 0.1 M britton-rabinson buffer solution [pH=5] a glassy carbon electrode [GCE] was used as the working electrode, a Ag/AgCl/ KCl[sat.] electrode served as the reference electrode, and a platinum wire as the auxiliary electrode under the Differential Pulse Voltammetry [DPV] mode. The peak current obtained from DPV was linearly dependent on the Furan concentration in the range 12-360 Micro M [0.81-24.5 ppm] with correlation coefficients of 0.999 and a limit of detection [LOD] of 3 Micro M [0.2 ppm] and limit of quantification [LOQ] of 10 Micro M [0.68 ppm] were calculated, respectively. The values of the electron-transfer coefficient [Alpha] involved in the rate determining step calculated from the linear plots of Ep against ln [v] in the pH range investigated were 0.8 confirming the irreversible nature of the oxidation peak. The reproducibility of the method was tested by analyzing 10 samples containing 30 Micro M of Furan. The RSD% of the method thus obtained was 3.0% which showed excellent reproducibility for this developed methods: