After exposing the black mulberry juice to ultraviolet light with the intensity of 5, 10 and 20 kJ/m2, their quality analysis have been performed for 4 days at +4 °C and +25 °C. Within the current study the antioxidant activity, Total Phenolic Content (TPC), microbial charges and pH values of the samples have also been investigated. In the UV light exposed samples there existed no meaningful difference in the % DPPH radical scavenging activity level, a small amount of decrease has been detected in the TPC creation process. While the storage time worsens the DPPH activity, it affects the TPC positively. Microbial studies showed reduction in total mesophile aerobic microorganisms, yeasts and mould counts about by 1-log cycle on UV treatments. This is the first report on the effects of UV radiation on black mulberry.

UV-C treatment, Black mulberry, Quality, Fruit juice