Electrochemical Determination of Folic Acid in Fruit Juices Samples Using Electroanalytical Sensor Amplified With Cuo/Swcnts and 1-Butyl2-,3-Dimethylimidazolium Hexafluorophosphate

Folic acid is an important food additive found in most food products. this research study focused on making a powerful analytical device to determine the folic acid concentration in food products. an electrochemical amplified sensor based on paste electrode (pe) modified with cuo-cnts and 1-butyl-2,3-dimethylimidazolium hexafluorophosphate (bdhfp) was fabricated and used to study the electro-oxidation of folic acid. oxidation current of folic acid was improved about 2.8 times at pe/m/cuocnts/ bdhfp compared with that of the pe. in addition, an irreversible and ph dependent oxidation signal was detected for redox reaction of folic acid at surface of pe/m/cuo-cnts/bdhfp. active surface area of pe was increased from 0.11 cm2 to 0.18 cm2 after modification with cuo-cnts and bdhfp. differential pulse voltammetric (dpv) signals displayed a linear dynamic range 3.0 nm–250 μm with detection limit 0.8 nm for measurement of folic acid. to study the ability of the pe/m/cuocnts/ bdhfp to determine the folic acid in real samples, apple and orange juices were selected and recovery data between 99.29%-101.6% confirm high performance ability of pe/m/cuo-cnts/bdhfp for determination of folic acid in real samples.