Abstract
Orange juice and gazpacho, a cold vegetable soup, were submitted to high intensity pulsed electric fields (HIPEF). The effects of electric field strength, treatment time, pulse frequency, width and polarity, as process parameters, on vitamin C retention and antioxidant capacity of both products were evaluated and compared to those in a heat pasteurization. Vitamin C was determined by HPLC and antioxidant capacity through the inhibition of the DPPH (1,1-diphenyl-2-picrylhydrazyl) radical. Orange juice and gazpacho retained a 87.5–98.2% and 84.3–97.1% of vitamin C, respectively, after HIPEF treatments. Pulses applied in bipolar mode, as well as a lower electric field strength, treatment time, pulse frequency and width, led to higher levels of vitamin C retention ( p < 0.05). HIPEF-treated orange juice and gazpacho always showed a vitamin C retention higher than that of the heat-pasteurized products. There were no differences ( p < 0.05) in antioxidant capacity between HIPEF-treated and untreated products, whereas heat-treated foods showed lower values of antioxidant capacity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
