Comparison of UV-C treatment and thermal pasteurization on quality of Chokanan mango (Mangifera indica L.) juice

• Published in: Food and bioproducts processing Vol. 94; pp. 313 - 321
• Main Authors: Santhirasegaram, Vicknesha, Razali, Zuliana, George, Dominic Soloman, Somasundram, Chandran
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2015
• Subjects: Antioxidant activity; Antioxidants; Carotenoids; Chokanan mango; Exposure; Juice; Juices; Mangifera indica; Microbial count; Microorganisms; Pasteurization; Polyphenols; Thermal pasteurization; Ultraviolet treatment; Ultraviolet treatment; Thermal pasteurization; Juice; Chokanan mango; Antioxidant activity; Microbial count
• ISSN: 0960-3085; 1744-3571
• DOI: 10.1016/j.fbp.2014.03.011

•Chokanan mango has potential health promoting properties.•Quality of Chokanan mango juice after UV-C and thermal treatment was compared.•UV-C treatment was effective in improving the quality parameters of the juice.•UV-C and thermal treatment exhibited reduction in microbial count.•UV-C treatment is a feasible alternative to thermal treatment. Ultraviolet-c treatment is an emerging food processing technology for health-conscious consumers. Freshly squeezed Chokanan mango juice was exposed to UV-C light (for 15, 30 and 60min at 25°C) and thermally pasteurized (at 90°C for 60s) to compare the effect on microbial inactivation, physicochemical properties, antioxidant activities and other quality parameters. In addition, shelf life study of juice samples stored at 4±1°C was conducted for 5 weeks. After UV-C treatment and thermal pasteurization, no significant changes occurred in physicochemical properties. A significant increase in extractability of carotenoids (6%), polyphenols (31%), and flavonoids (3%) were observed in juice exposed to UV-C light for 15 and 30min, when compared to freshly squeezed juice. Besides that, enhancement of antioxidant activity was observed after UV-C treatment. Thermal pasteurization and UV-C treatment exhibited significant reduction in microbial load and prolonged shelf-life of juice. The results obtained support the use of UV-C light to improve the quality of Chokanan mango juice along with safety standards as an alternative to thermal pasteurization.